97118881 has 4 divisors (see below), whose sum is σ = 98289072. Its totient is φ = 95948692.

The previous prime is 97118863. The next prime is 97118911. The reversal of 97118881 is 18881179.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18881179 = 227 ⋅83177.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97118881 is a prime.

It is a super-2 number, since 2×97118881² = 18864154093384322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97118831) 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, 584971 + ... + 585136.

It is an arithmetic number, because the mean of its divisors is an integer number (24572268).

Almost surely, 2^97118881 is an apocalyptic number.

It is an amenable number.

97118881 is a deficient number, since it is larger than the sum of its proper divisors (1170191).

97118881 is a wasteful number, since it uses less digits than its factorization.

97118881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170190.

The product of its digits is 32256, while the sum is 43.

The square root of 97118881 is about 9854.8912221292. The cubic root of 97118881 is about 459.6577179638.

The spelling of 97118881 in words is "ninety-seven million, one hundred eighteen thousand, eight hundred eighty-one".