97456531 has 4 divisors (see below), whose sum is σ = 97591312. Its totient is φ = 97321752.

The previous prime is 97456487. The next prime is 97456553. The reversal of 97456531 is 13565479.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13565479 = 1609 ⋅8431.

It is a cyclic number.

It is not a de Polignac number, because 97456531 - 2¹³ = 97448339 is a prime.

It is a super-2 number, since 2×97456531² = 18995550869107922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97456561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66300 + ... + 67753.

It is an arithmetic number, because the mean of its divisors is an integer number (24397828).

Almost surely, 2^97456531 is an apocalyptic number.

97456531 is a deficient number, since it is larger than the sum of its proper divisors (134781).

97456531 is a wasteful number, since it uses less digits than its factorization.

97456531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134780.

The product of its digits is 113400, while the sum is 40.

The square root of 97456531 is about 9872.0074452970. The cubic root of 97456531 is about 460.1897940817.

The spelling of 97456531 in words is "ninety-seven million, four hundred fifty-six thousand, five hundred thirty-one".