29685389057 has 2 divisors, whose sum is σ = 29685389058. Its totient is φ = 29685389056.

The previous prime is 29685389021. The next prime is 29685389059. The reversal of 29685389057 is 75098358692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28577564401 + 1107824656 = 169049^2 + 33284^2 .

It is a cyclic number.

It is not a de Polignac number, because 29685389057 - 2²⁶ = 29618280193 is a prime.

It is a super-3 number, since 3×29685389057³ (a number of 32 digits) contains 333 as substring.

Together with 29685389059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29685389059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14842694528 + 14842694529.

It is an arithmetic number, because the mean of its divisors is an integer number (14842694529).

Almost surely, 2^29685389057 is an apocalyptic number.

It is an amenable number.

29685389057 is a deficient number, since it is larger than the sum of its proper divisors (1).

29685389057 is an equidigital number, since it uses as much as digits as its factorization.

29685389057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 29685389057 in words is "twenty-nine billion, six hundred eighty-five million, three hundred eighty-nine thousand, fifty-seven".