97747631 has 4 divisors (see below), whose sum is σ = 101997552. Its totient is φ = 93497712.

The previous prime is 97747627. The next prime is 97747633. The reversal of 97747631 is 13674779.

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 97747631 - 2² = 97747627 is a prime.

It is a super-2 number, since 2×97747631² = 19109198732224322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97747633) 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, 2124926 + ... + 2124971.

It is an arithmetic number, because the mean of its divisors is an integer number (25499388).

Almost surely, 2^97747631 is an apocalyptic number.

97747631 is a deficient number, since it is larger than the sum of its proper divisors (4249921).

97747631 is a wasteful number, since it uses less digits than its factorization.

97747631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249920.

The product of its digits is 222264, while the sum is 44.

The square root of 97747631 is about 9886.7401604371. The cubic root of 97747631 is about 460.6475300899.

The spelling of 97747631 in words is "ninety-seven million, seven hundred forty-seven thousand, six hundred thirty-one".