139913091 has 24 divisors (see below), whose sum is σ = 205827440. Its totient is φ = 91570176.

The previous prime is 139913089. The next prime is 139913129. The reversal of 139913091 is 190319931.

139913091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139913091 - 2¹ = 139913089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139913051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120771 + ... + 121923.

Almost surely, 2^139913091 is an apocalyptic number.

139913091 is a deficient number, since it is larger than the sum of its proper divisors (65914349).

139913091 is a wasteful number, since it uses less digits than its factorization.

139913091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395 (or 1392 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 36.

The square root of 139913091 is about 11828.4864205020. The cubic root of 139913091 is about 519.1419416416.

The spelling of 139913091 in words is "one hundred thirty-nine million, nine hundred thirteen thousand, ninety-one".