100687988 has 6 divisors (see below), whose sum is σ = 176203986. Its totient is φ = 50343992.

The previous prime is 100687981. The next prime is 100688009. The reversal of 100687988 is 889786001.

It can be written as a sum of positive squares in only one way, i.e., 57942544 + 42745444 = 7612^2 + 6538^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100687981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12585995 + ... + 12586002.

It is an arithmetic number, because the mean of its divisors is an integer number (29367331).

Almost surely, 2^100687988 is an apocalyptic number.

It is an amenable number.

100687988 is a deficient number, since it is larger than the sum of its proper divisors (75515998).

100687988 is a wasteful number, since it uses less digits than its factorization.

100687988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25172001 (or 25171999 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 100687988 is about 10034.3404367203. The cubic root of 100687988 is about 465.2209040200.

The spelling of 100687988 in words is "one hundred million, six hundred eighty-seven thousand, nine hundred eighty-eight".