97787638 has 16 divisors (see below), whose sum is σ = 167257440. Its totient is φ = 42477696.

The previous prime is 97787629. The next prime is 97787647. The reversal of 97787638 is 83678779.

It is an interprime number because it is at equal distance from previous prime (97787629) and next prime (97787647).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110178 + ... + 111061.

It is an arithmetic number, because the mean of its divisors is an integer number (10453590).

Almost surely, 2^97787638 is an apocalyptic number.

97787638 is a deficient number, since it is larger than the sum of its proper divisors (69469802).

97787638 is a wasteful number, since it uses less digits than its factorization.

97787638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221271.

The product of its digits is 3556224, while the sum is 55.

The square root of 97787638 is about 9888.7632189268. The cubic root of 97787638 is about 460.7103674595.

The spelling of 97787638 in words is "ninety-seven million, seven hundred eighty-seven thousand, six hundred thirty-eight".