187969864 has 16 divisors (see below), whose sum is σ = 363813120. Its totient is φ = 90953040.

The previous prime is 187969843. The next prime is 187969883. The reversal of 187969864 is 468969781.

It is a junction number, because it is equal to n+sod(n) for n = 187969799 and 187969808.

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 3 ways as a sum of consecutive naturals, for example, 378724 + ... + 379219.

It is an arithmetic number, because the mean of its divisors is an integer number (22738320).

Almost surely, 2^187969864 is an apocalyptic number.

It is an amenable number.

187969864 is a deficient number, since it is larger than the sum of its proper divisors (175843256).

187969864 is a wasteful number, since it uses less digits than its factorization.

187969864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757980 (or 757976 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 58.

The square root of 187969864 is about 13710.2102099129. The cubic root of 187969864 is about 572.8348202593.

The spelling of 187969864 in words is "one hundred eighty-seven million, nine hundred sixty-nine thousand, eight hundred sixty-four".