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82399397 = 101980863
BaseRepresentation
bin1001110100101…
…01000010100101
312202001022201112
410322111002211
5132043240042
612102034405
72020245323
oct472250245
9182038645
1082399397
114256a983
1223718a05
13140c0552
14ad2cd13
157379982
hex4e950a5

82399397 has 4 divisors (see below), whose sum is σ = 82481280. Its totient is φ = 82317516.

The previous prime is 82399379. The next prime is 82399399. The reversal of 82399397 is 79399328.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82399397 - 212 = 82395301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82399399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39413 + ... + 41450.

It is an arithmetic number, because the mean of its divisors is an integer number (20620320).

Almost surely, 282399397 is an apocalyptic number.

It is an amenable number.

82399397 is a deficient number, since it is larger than the sum of its proper divisors (81883).

82399397 is a wasteful number, since it uses less digits than its factorization.

82399397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81882.

The product of its digits is 734832, while the sum is 50.

The square root of 82399397 is about 9077.4113600740. The cubic root of 82399397 is about 435.1523613022.

The spelling of 82399397 in words is "eighty-two million, three hundred ninety-nine thousand, three hundred ninety-seven".

Divisors: 1 1019 80863 82399397