97205391 has 24 divisors (see below), whose sum is σ = 145176720. Its totient is φ = 62640000.

The previous prime is 97205377. The next prime is 97205393. The reversal of 97205391 is 19350279.

It is not a de Polignac number, because 97205391 - 2⁵ = 97205359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97205393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30891 + ... + 33891.

It is an arithmetic number, because the mean of its divisors is an integer number (6049030).

Almost surely, 2^97205391 is an apocalyptic number.

97205391 is a deficient number, since it is larger than the sum of its proper divisors (47971329).

97205391 is a wasteful number, since it uses less digits than its factorization.

97205391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127 (or 3124 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 97205391 is about 9859.2794361454. The cubic root of 97205391 is about 459.7941596373.

The spelling of 97205391 in words is "ninety-seven million, two hundred five thousand, three hundred ninety-one".