97764167831 has 4 divisors (see below), whose sum is σ = 106651819464. Its totient is φ = 88876516200.

The previous prime is 97764167827. The next prime is 97764167849. The reversal of 97764167831 is 13876146779.

It is a happy number.

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 97764167831 - 2² = 97764167827 is a prime.

It is a super-2 number, since 2×97764167831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97764167801) 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, 4443825800 + ... + 4443825821.

It is an arithmetic number, because the mean of its divisors is an integer number (26662954866).

Almost surely, 2^97764167831 is an apocalyptic number.

97764167831 is a deficient number, since it is larger than the sum of its proper divisors (8887651633).

97764167831 is a wasteful number, since it uses less digits than its factorization.

97764167831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8887651632.

The product of its digits is 10668672, while the sum is 59.

The spelling of 97764167831 in words is "ninety-seven billion, seven hundred sixty-four million, one hundred sixty-seven thousand, eight hundred thirty-one".