139866874 has 24 divisors (see below), whose sum is σ = 249736608. Its totient is φ = 58547160.

The previous prime is 139866851. The next prime is 139866901. The reversal of 139866874 is 478668931.

It is a happy number.

139866874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12382 + ... + 20809.

It is an arithmetic number, because the mean of its divisors is an integer number (10405692).

Almost surely, 2^139866874 is an apocalyptic number.

139866874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

139866874 is a deficient number, since it is larger than the sum of its proper divisors (109869734).

139866874 is a wasteful number, since it uses less digits than its factorization.

139866874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33250 (or 33243 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 52.

The square root of 139866874 is about 11826.5326279514. The cubic root of 139866874 is about 519.0847732349.

The spelling of 139866874 in words is "one hundred thirty-nine million, eight hundred sixty-six thousand, eight hundred seventy-four".