97921518 has 8 divisors (see below), whose sum is σ = 195843048. Its totient is φ = 32640504.

The previous prime is 97921517. The next prime is 97921559. The reversal of 97921518 is 81512979.

It is a sphenic number, since it is the product of 3 distinct primes.

97921518 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 97921518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97921517) 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, 8160121 + ... + 8160132.

It is an arithmetic number, because the mean of its divisors is an integer number (24480381).

Almost surely, 2^97921518 is an apocalyptic number.

97921518 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

97921518 is a wasteful number, since it uses less digits than its factorization.

97921518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16320258.

The product of its digits is 45360, while the sum is 42.

The square root of 97921518 is about 9895.5302030765. The cubic root of 97921518 is about 460.9205227791.

The spelling of 97921518 in words is "ninety-seven million, nine hundred twenty-one thousand, five hundred eighteen".