97639998 has 24 divisors (see below), whose sum is σ = 196867608. Its totient is φ = 32284128.

The previous prime is 97639979. The next prime is 97639999. The reversal of 97639998 is 89993679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97639999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132840 + ... + 133572.

It is an arithmetic number, because the mean of its divisors is an integer number (8202817).

Almost surely, 2^97639998 is an apocalyptic number.

97639998 is an abundant number, since it is smaller than the sum of its proper divisors (99227610).

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

97639998 is a wasteful number, since it uses less digits than its factorization.

97639998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 887 counting only the distinct ones).

The product of its digits is 6613488, while the sum is 60.

The square root of 97639998 is about 9881.2953604272. The cubic root of 97639998 is about 460.4783901507.

The spelling of 97639998 in words is "ninety-seven million, six hundred thirty-nine thousand, nine hundred ninety-eight".