Search a number
-
+
29930969 = 155319273
BaseRepresentation
bin111001000101…
…1010111011001
32002022122120102
41302023113121
530130242334
62545305145
7512260205
oct162132731
962278512
1029930969
1115993642
12a0351b5
13627c743
143d91b05
15296367e
hex1c8b5d9

29930969 has 4 divisors (see below), whose sum is σ = 29951796. Its totient is φ = 29910144.

The previous prime is 29930939. The next prime is 29931001. The reversal of 29930969 is 96903992.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10465225 + 19465744 = 3235^2 + 4412^2 .

It is a cyclic number.

It is not a de Polignac number, because 29930969 - 224 = 13153753 is a prime.

It is a super-2 number, since 2×299309692 = 1791725810557922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29930939) 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, 8084 + ... + 11189.

It is an arithmetic number, because the mean of its divisors is an integer number (7487949).

Almost surely, 229930969 is an apocalyptic number.

It is an amenable number.

29930969 is a deficient number, since it is larger than the sum of its proper divisors (20827).

29930969 is a wasteful number, since it uses less digits than its factorization.

29930969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20826.

The product of its (nonzero) digits is 236196, while the sum is 47.

The square root of 29930969 is about 5470.9203064932. The cubic root of 29930969 is about 310.4847393753.

The spelling of 29930969 in words is "twenty-nine million, nine hundred thirty thousand, nine hundred sixty-nine".

Divisors: 1 1553 19273 29930969