97477521 has 4 divisors (see below), whose sum is σ = 129970032. Its totient is φ = 64985012.

The previous prime is 97477489. The next prime is 97477559. The reversal of 97477521 is 12577479.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12577479 = 3 ⋅4192493.

It is a cyclic number.

It is not a de Polignac number, because 97477521 - 2⁵ = 97477489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97477561) 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, 16246251 + ... + 16246256.

It is an arithmetic number, because the mean of its divisors is an integer number (32492508).

Almost surely, 2^97477521 is an apocalyptic number.

It is an amenable number.

97477521 is a deficient number, since it is larger than the sum of its proper divisors (32492511).

97477521 is a wasteful number, since it uses less digits than its factorization.

97477521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32492510.

The product of its digits is 123480, while the sum is 42.

The square root of 97477521 is about 9873.0704950385. The cubic root of 97477521 is about 460.2228299740. Note that the first 3 decimals are identical.

Subtracting from 97477521 its sum of digits (42), we obtain a palindrome (97477479).

The spelling of 97477521 in words is "ninety-seven million, four hundred seventy-seven thousand, five hundred twenty-one".