97639202929 has 4 divisors (see below), whose sum is σ = 97640799220. Its totient is φ = 97637606640.

The previous prime is 97639202887. The next prime is 97639202933. The reversal of 97639202929 is 92920293679.

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 12281737329 + 85357465600 = 110823^2 + 292160^2 .

It is a cyclic number.

It is not a de Polignac number, because 97639202929 - 2²¹ = 97637105777 is a prime.

It is a super-2 number, since 2×97639202929² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97639202329) 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, 702582 + ... + 829999.

It is an arithmetic number, because the mean of its divisors is an integer number (24410199805).

Almost surely, 2^97639202929 is an apocalyptic number.

It is an amenable number.

97639202929 is a deficient number, since it is larger than the sum of its proper divisors (1596291).

97639202929 is a wasteful number, since it uses less digits than its factorization.

97639202929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596290.

The product of its (nonzero) digits is 6613488, while the sum is 58.

The spelling of 97639202929 in words is "ninety-seven billion, six hundred thirty-nine million, two hundred two thousand, nine hundred twenty-nine".