139389926 has 16 divisors (see below), whose sum is σ = 225426768. Its totient is φ = 64260000.

The previous prime is 139389917. The next prime is 139389967. The reversal of 139389926 is 629983931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24776 + ... + 29876.

It is an arithmetic number, because the mean of its divisors is an integer number (14089173).

Almost surely, 2^139389926 is an apocalyptic number.

139389926 is a deficient number, since it is larger than the sum of its proper divisors (86036842).

139389926 is a wasteful number, since it uses less digits than its factorization.

139389926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6167.

The product of its digits is 629856, while the sum is 50.

The square root of 139389926 is about 11806.3510874444. The cubic root of 139389926 is about 518.4940725095.

It can be divided in two parts, 1393 and 89926, that added together give a palindrome (91319).

The spelling of 139389926 in words is "one hundred thirty-nine million, three hundred eighty-nine thousand, nine hundred twenty-six".