139806807 has 64 divisors (see below), whose sum is σ = 235929600. Its totient is φ = 71850240.

The previous prime is 139806743. The next prime is 139806817. The reversal of 139806807 is 708608931.

It is not a de Polignac number, because 139806807 - 2⁶ = 139806743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139806817) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1100778 + ... + 1100904.

It is an arithmetic number, because the mean of its divisors is an integer number (3686400).

Almost surely, 2^139806807 is an apocalyptic number.

139806807 is a deficient number, since it is larger than the sum of its proper divisors (96122793).

139806807 is a wasteful number, since it uses less digits than its factorization.

139806807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 139806807 is about 11823.9928535161. The cubic root of 139806807 is about 519.0104541611.

The spelling of 139806807 in words is "one hundred thirty-nine million, eight hundred six thousand, eight hundred seven".