139580831 has 4 divisors (see below), whose sum is σ = 150317832. Its totient is φ = 128843832.

The previous prime is 139580827. The next prime is 139580839. The reversal of 139580831 is 138085931.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 139580831 - 2² = 139580827 is a prime.

It is a super-2 number, since 2×139580831² = 38965616765301122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139580839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5368481 + ... + 5368506.

It is an arithmetic number, because the mean of its divisors is an integer number (37579458).

Almost surely, 2^139580831 is an apocalyptic number.

139580831 is a deficient number, since it is larger than the sum of its proper divisors (10737001).

139580831 is a wasteful number, since it uses less digits than its factorization.

139580831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10737000.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 139580831 is about 11814.4331645661. The cubic root of 139580831 is about 518.7306700883.

The spelling of 139580831 in words is "one hundred thirty-nine million, five hundred eighty thousand, eight hundred thirty-one".