97861818 has 32 divisors (see below), whose sum is σ = 211602240. Its totient is φ = 30067200.

The previous prime is 97861817. The next prime is 97861831. The reversal of 97861818 is 81816879.

It is not an unprimeable number, because it can be changed into a prime (97861811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7383 + ... + 15818.

It is an arithmetic number, because the mean of its divisors is an integer number (6612570).

Almost surely, 2^97861818 is an apocalyptic number.

97861818 is an abundant number, since it is smaller than the sum of its proper divisors (113740422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97861818 is a wasteful number, since it uses less digits than its factorization.

97861818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23262.

The product of its digits is 193536, while the sum is 48.

The square root of 97861818 is about 9892.5132297106. The cubic root of 97861818 is about 460.8268336364.

The spelling of 97861818 in words is "ninety-seven million, eight hundred sixty-one thousand, eight hundred eighteen".