97531947 has 6 divisors (see below), whose sum is σ = 140879492. Its totient is φ = 65021292.

The previous prime is 97531943. The next prime is 97531961. The reversal of 97531947 is 74913579.

It is not a de Polignac number, because 97531947 - 2² = 97531943 is a prime.

It is a super-2 number, since 2×97531947² = 19024961371221618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97531943) 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, 5418433 + ... + 5418450.

Almost surely, 2^97531947 is an apocalyptic number.

97531947 is a deficient number, since it is larger than the sum of its proper divisors (43347545).

97531947 is a wasteful number, since it uses less digits than its factorization.

97531947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10836889 (or 10836886 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 97531947 is about 9875.8263958010. The cubic root of 97531947 is about 460.3084682734.

The spelling of 97531947 in words is "ninety-seven million, five hundred thirty-one thousand, nine hundred forty-seven".