61687992 has 16 divisors (see below), whose sum is σ = 154220040. Its totient is φ = 20562656.

The previous prime is 61687987. The next prime is 61687999. The reversal of 61687992 is 29978616.

61687992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61687999) 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 3 ways as a sum of consecutive naturals, for example, 1285143 + ... + 1285190.

Almost surely, 2^61687992 is an apocalyptic number.

It is an amenable number.

61687992 is an abundant number, since it is smaller than the sum of its proper divisors (92532048).

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

61687992 is a wasteful number, since it uses less digits than its factorization.

61687992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570342 (or 2570338 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 61687992 is about 7854.1703572051. The cubic root of 61687992 is about 395.1241227185.

The spelling of 61687992 in words is "sixty-one million, six hundred eighty-seven thousand, nine hundred ninety-two".