97531563 has 4 divisors (see below), whose sum is σ = 130042088. Its totient is φ = 65021040.

The previous prime is 97531537. The next prime is 97531571. The reversal of 97531563 is 36513579.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 97531563 - 2⁵ = 97531531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97531513) 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, 16255258 + ... + 16255263.

It is an arithmetic number, because the mean of its divisors is an integer number (32510522).

Almost surely, 2^97531563 is an apocalyptic number.

97531563 is a deficient number, since it is larger than the sum of its proper divisors (32510525).

97531563 is a wasteful number, since it uses less digits than its factorization.

97531563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32510524.

The product of its digits is 85050, while the sum is 39.

The square root of 97531563 is about 9875.8069543709. The cubic root of 97531563 is about 460.3078641682.

The spelling of 97531563 in words is "ninety-seven million, five hundred thirty-one thousand, five hundred sixty-three".