97390195920 has 60 divisors (see below), whose sum is σ = 327068743716. Its totient is φ = 25970718720.

The previous prime is 97390195879. The next prime is 97390195921. The reversal of 97390195920 is 2959109379.

97390195920 is a `hidden beast` number, since 9 + 7 + 39 + 0 + 19 + 592 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11475551376 + 85914644544 = 107124^2 + 293112^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×97390195920² (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 (97390195921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67631361 + ... + 67632800.

Almost surely, 2^97390195920 is an apocalyptic number.

97390195920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

97390195920 is an abundant number, since it is smaller than the sum of its proper divisors (229678547796).

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

97390195920 is a wasteful number, since it uses less digits than its factorization.

97390195920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135264180 (or 135264171 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 54.

The spelling of 97390195920 in words is "ninety-seven billion, three hundred ninety million, one hundred ninety-five thousand, nine hundred twenty".