97397555 has 4 divisors (see below), whose sum is σ = 116877072. Its totient is φ = 77918040.

The previous prime is 97397551. The next prime is 97397557. The reversal of 97397555 is 55579379.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55579379 = 5189 ⋅10711.

It is not a de Polignac number, because 97397555 - 2² = 97397551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97397551) 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, 9739751 + ... + 9739760.

It is an arithmetic number, because the mean of its divisors is an integer number (29219268).

Almost surely, 2^97397555 is an apocalyptic number.

97397555 is a deficient number, since it is larger than the sum of its proper divisors (19479517).

97397555 is a wasteful number, since it uses less digits than its factorization.

97397555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19479516.

The product of its digits is 1488375, while the sum is 50.

The square root of 97397555 is about 9869.0199614754. The cubic root of 97397555 is about 460.0969471153.

The spelling of 97397555 in words is "ninety-seven million, three hundred ninety-seven thousand, five hundred fifty-five".