102631986 has 24 divisors (see below), whose sum is σ = 230038380. Its totient is φ = 33030816.

The previous prime is 102631967. The next prime is 102631993. The reversal of 102631986 is 689136201.

102631986 is a `hidden beast` number, since 10 + 2 + 631 + 9 + 8 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 93721761 + 8910225 = 9681^2 + 2985^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 102631986.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97785 + ... + 98828.

Almost surely, 2^102631986 is an apocalyptic number.

102631986 is an abundant number, since it is smaller than the sum of its proper divisors (127406394).

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

102631986 is a wasteful number, since it uses less digits than its factorization.

102631986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196650 (or 196647 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 102631986 is about 10130.7445925756. The cubic root of 102631986 is about 468.1958691413.

The spelling of 102631986 in words is "one hundred two million, six hundred thirty-one thousand, nine hundred eighty-six".