29979431 has 2 divisors, whose sum is σ = 29979432. Its totient is φ = 29979430.

The previous prime is 29979409. The next prime is 29979437. The reversal of 29979431 is 13497992.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29979431 is a prime.

It is a super-2 number, since 2×29979431² = 1797532566167522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29979437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14989715 + 14989716.

It is an arithmetic number, because the mean of its divisors is an integer number (14989716).

Almost surely, 2^29979431 is an apocalyptic number.

29979431 is a deficient number, since it is larger than the sum of its proper divisors (1).

29979431 is an equidigital number, since it uses as much as digits as its factorization.

29979431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 29979431 is about 5475.3475688763. The cubic root of 29979431 is about 310.6522202866.

The spelling of 29979431 in words is "twenty-nine million, nine hundred seventy-nine thousand, four hundred thirty-one".