97210621 has 4 divisors (see below), whose sum is σ = 97617600. Its totient is φ = 96803644.

The previous prime is 97210613. The next prime is 97210643. The reversal of 97210621 is 12601279.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 97210621 - 2³ = 97210613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97210621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97210651) 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, 203131 + ... + 203608.

It is an arithmetic number, because the mean of its divisors is an integer number (24404400).

Almost surely, 2^97210621 is an apocalyptic number.

It is an amenable number.

97210621 is a deficient number, since it is larger than the sum of its proper divisors (406979).

97210621 is a wasteful number, since it uses less digits than its factorization.

97210621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406978.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 97210621 is about 9859.5446649427. The cubic root of 97210621 is about 459.8024056832.

The spelling of 97210621 in words is "ninety-seven million, two hundred ten thousand, six hundred twenty-one".