97856919 has 6 divisors (see below), whose sum is σ = 141348896. Its totient is φ = 65237940.

The previous prime is 97856911. The next prime is 97856939. The reversal of 97856919 is 91965879.

97856919 is a `hidden beast` number, since 9 + 78 + 569 + 1 + 9 = 666.

It is not a de Polignac number, because 97856919 - 2³ = 97856911 is a prime.

It is a super-2 number, since 2×97856919² = 19151953192345122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97856911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5436487 + ... + 5436504.

Almost surely, 2^97856919 is an apocalyptic number.

97856919 is a deficient number, since it is larger than the sum of its proper divisors (43491977).

97856919 is a wasteful number, since it uses less digits than its factorization.

97856919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10872997 (or 10872994 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 97856919 is about 9892.2656151157. The cubic root of 97856919 is about 460.8191437856.

The spelling of 97856919 in words is "ninety-seven million, eight hundred fifty-six thousand, nine hundred nineteen".