139682387 has 12 divisors (see below), whose sum is σ = 160154280. Its totient is φ = 121350528.

The previous prime is 139682383. The next prime is 139682393. The reversal of 139682387 is 783286931.

It is not a de Polignac number, because 139682387 - 2² = 139682383 is a prime.

It is a super-2 number, since 2×139682387² = 39022338476035538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139682383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21437 + ... + 27182.

It is an arithmetic number, because the mean of its divisors is an integer number (13346190).

Almost surely, 2^139682387 is an apocalyptic number.

139682387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

139682387 is a deficient number, since it is larger than the sum of its proper divisors (20471893).

139682387 is a wasteful number, since it uses less digits than its factorization.

139682387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48662 (or 48649 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 139682387 is about 11818.7303463612. The cubic root of 139682387 is about 518.8564453359.

The spelling of 139682387 in words is "one hundred thirty-nine million, six hundred eighty-two thousand, three hundred eighty-seven".