97021439879 has 32 divisors (see below), whose sum is σ = 124663418880. Its totient is φ = 73390914432.

The previous prime is 97021439861. The next prime is 97021439909. The reversal of 97021439879 is 97893412079.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97021439879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97021430879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4776557 + ... + 4796825.

It is an arithmetic number, because the mean of its divisors is an integer number (3895731840).

Almost surely, 2^97021439879 is an apocalyptic number.

97021439879 is a deficient number, since it is larger than the sum of its proper divisors (27641979001).

97021439879 is a wasteful number, since it uses less digits than its factorization.

97021439879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22599.

The product of its (nonzero) digits is 6858432, while the sum is 59.

The spelling of 97021439879 in words is "ninety-seven billion, twenty-one million, four hundred thirty-nine thousand, eight hundred seventy-nine".