97172947836 has 24 divisors (see below), whose sum is σ = 251929865040. Its totient is φ = 32390982576.

The previous prime is 97172947831. The next prime is 97172947853. The reversal of 97172947836 is 63874927179.

97172947836 is a `hidden beast` number, since 97 + 1 + 72 + 9 + 478 + 3 + 6 = 666.

It is a super-2 number, since 2×97172947836² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97172947831) 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 7 ways as a sum of consecutive naturals, for example, 449874651 + ... + 449874866.

It is an arithmetic number, because the mean of its divisors is an integer number (10497077710).

Almost surely, 2^97172947836 is an apocalyptic number.

It is an amenable number.

97172947836 is an abundant number, since it is smaller than the sum of its proper divisors (154756917204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97172947836 is a wasteful number, since it uses less digits than its factorization.

97172947836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899749530 (or 899749522 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The spelling of 97172947836 in words is "ninety-seven billion, one hundred seventy-two million, nine hundred forty-seven thousand, eight hundred thirty-six".