97629578729 has 4 divisors (see below), whose sum is σ = 97642172484. Its totient is φ = 97616984976.

The previous prime is 97629578671. The next prime is 97629578737. The reversal of 97629578729 is 92787592679.

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 91739323225 + 5890255504 = 302885^2 + 76748^2 .

It is a cyclic number.

It is not a de Polignac number, because 97629578729 - 2²⁸ = 97361143273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97629578129) 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, 6285242 + ... + 6300755.

It is an arithmetic number, because the mean of its divisors is an integer number (24410543121).

Almost surely, 2^97629578729 is an apocalyptic number.

It is an amenable number.

97629578729 is a deficient number, since it is larger than the sum of its proper divisors (12593755).

97629578729 is a wasteful number, since it uses less digits than its factorization.

97629578729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12593754.

The product of its digits is 240045120, while the sum is 71.

The spelling of 97629578729 in words is "ninety-seven billion, six hundred twenty-nine million, five hundred seventy-eight thousand, seven hundred twenty-nine".