97873890631 has 4 divisors (see below), whose sum is σ = 106771517064. Its totient is φ = 88976264200.

The previous prime is 97873890629. The next prime is 97873890637. The reversal of 97873890631 is 13609837879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97873890631 - 2¹ = 97873890629 is a prime.

It is a super-2 number, since 2×97873890631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97873890631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97873890637) 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, 4448813200 + ... + 4448813221.

It is an arithmetic number, because the mean of its divisors is an integer number (26692879266).

Almost surely, 2^97873890631 is an apocalyptic number.

97873890631 is a deficient number, since it is larger than the sum of its proper divisors (8897626433).

97873890631 is a wasteful number, since it uses less digits than its factorization.

97873890631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8897626432.

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 97873890631 in words is "ninety-seven billion, eight hundred seventy-three million, eight hundred ninety thousand, six hundred thirty-one".