97937820 has 36 divisors (see below), whose sum is σ = 297078600. Its totient is φ = 26116704.

The previous prime is 97937813. The next prime is 97937857. The reversal of 97937820 is 2873979.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271870 + ... + 272229.

Almost surely, 2^97937820 is an apocalyptic number.

97937820 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

97937820 is an abundant number, since it is smaller than the sum of its proper divisors (199140780).

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

97937820 is a wasteful number, since it uses less digits than its factorization.

97937820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544114 (or 544109 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 97937820 is about 9896.3538740286. The cubic root of 97937820 is about 460.9460994163.

The spelling of 97937820 in words is "ninety-seven million, nine hundred thirty-seven thousand, eight hundred twenty".