97853721 has 16 divisors (see below), whose sum is σ = 149299584. Its totient is φ = 55845504.

The previous prime is 97853719. The next prime is 97853771. The reversal of 97853721 is 12735879.

It is not a de Polignac number, because 97853721 - 2¹ = 97853719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97853711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17191 + ... + 22163.

It is an arithmetic number, because the mean of its divisors is an integer number (9331224).

Almost surely, 2^97853721 is an apocalyptic number.

It is an amenable number.

97853721 is a deficient number, since it is larger than the sum of its proper divisors (51445863).

97853721 is a wasteful number, since it uses less digits than its factorization.

97853721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920.

The product of its digits is 105840, while the sum is 42.

The square root of 97853721 is about 9892.1039723610. The cubic root of 97853721 is about 460.8141238181.

The spelling of 97853721 in words is "ninety-seven million, eight hundred fifty-three thousand, seven hundred twenty-one".