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30976397 = 1710118041
BaseRepresentation
bin111011000101…
…0100110001101
32011021202121222
41312022212031
530412221042
63023533125
7524203124
oct166124615
964252558
1030976397
1116538031
12a45a1a5
13655753a
144184abb
152abd2d2
hex1d8a98d

30976397 has 8 divisors (see below), whose sum is σ = 33125112. Its totient is φ = 28864000.

The previous prime is 30976367. The next prime is 30976411. The reversal of 30976397 is 79367903.

It can be written as a sum of positive squares in 4 ways, for example, as 8213956 + 22762441 = 2866^2 + 4771^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30976397 - 26 = 30976333 is a prime.

It is a super-2 number, since 2×309763972 = 1919074342203218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30976367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7304 + ... + 10737.

It is an arithmetic number, because the mean of its divisors is an integer number (4140639).

Almost surely, 230976397 is an apocalyptic number.

It is an amenable number.

30976397 is a deficient number, since it is larger than the sum of its proper divisors (2148715).

30976397 is a wasteful number, since it uses less digits than its factorization.

30976397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18159.

The product of its (nonzero) digits is 214326, while the sum is 44.

The square root of 30976397 is about 5565.6443472432. The cubic root of 30976397 is about 314.0583181064.

The spelling of 30976397 in words is "thirty million, nine hundred seventy-six thousand, three hundred ninety-seven".

Divisors: 1 17 101 1717 18041 306697 1822141 30976397