97887192772 has 6 divisors (see below), whose sum is σ = 171302587358. Its totient is φ = 48943596384.

The previous prime is 97887192757. The next prime is 97887192773. The reversal of 97887192772 is 27729178879.

It can be written as a sum of positive squares in only one way, i.e., 97735015876 + 152176896 = 312626^2 + 12336^2 .

It is a junction number, because it is equal to n+sod(n) for n = 97887192698 and 97887192707.

It is not an unprimeable number, because it can be changed into a prime (97887192773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12235899093 + ... + 12235899100.

Almost surely, 2^97887192772 is an apocalyptic number.

It is an amenable number.

97887192772 is a deficient number, since it is larger than the sum of its proper divisors (73415394586).

97887192772 is a wasteful number, since it uses less digits than its factorization.

97887192772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24471798197 (or 24471798195 counting only the distinct ones).

The product of its digits is 49787136, while the sum is 67.

The spelling of 97887192772 in words is "ninety-seven billion, eight hundred eighty-seven million, one hundred ninety-two thousand, seven hundred seventy-two".