97861986 has 32 divisors (see below), whose sum is σ = 219516480. Its totient is φ = 32313888.

The previous prime is 97861963. The next prime is 97861999. The reversal of 97861986 is 68916879.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2691 + ... + 14246.

It is an arithmetic number, because the mean of its divisors is an integer number (6859890).

Almost surely, 2^97861986 is an apocalyptic number.

97861986 is an abundant number, since it is smaller than the sum of its proper divisors (121654494).

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

97861986 is a wasteful number, since it uses less digits than its factorization.

97861986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17055 (or 17049 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 97861986 is about 9892.5217209769. The cubic root of 97861986 is about 460.8270973377.

The spelling of 97861986 in words is "ninety-seven million, eight hundred sixty-one thousand, nine hundred eighty-six".