97704921 has 4 divisors (see below), whose sum is σ = 130273232. Its totient is φ = 65136612.

The previous prime is 97704913. The next prime is 97704923. The reversal of 97704921 is 12940779.

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 not a de Polignac number, because 97704921 - 2³ = 97704913 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 97704921.

It is not an unprimeable number, because it can be changed into a prime (97704923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16284151 + ... + 16284156.

It is an arithmetic number, because the mean of its divisors is an integer number (32568308).

Almost surely, 2^97704921 is an apocalyptic number.

It is an amenable number.

97704921 is a deficient number, since it is larger than the sum of its proper divisors (32568311).

97704921 is a wasteful number, since it uses less digits than its factorization.

97704921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32568310.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 97704921 is about 9884.5799607267. The cubic root of 97704921 is about 460.5804283027.

The spelling of 97704921 in words is "ninety-seven million, seven hundred four thousand, nine hundred twenty-one".