139570491 has 4 divisors (see below), whose sum is σ = 186093992. Its totient is φ = 93046992.

The previous prime is 139570471. The next prime is 139570507. The reversal of 139570491 is 194075931.

It is a happy number.

139570491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 139570491 - 2²² = 135376187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139570411) 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, 23261746 + ... + 23261751.

It is an arithmetic number, because the mean of its divisors is an integer number (46523498).

Almost surely, 2^139570491 is an apocalyptic number.

139570491 is a deficient number, since it is larger than the sum of its proper divisors (46523501).

139570491 is an equidigital number, since it uses as much as digits as its factorization.

139570491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46523500.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 139570491 is about 11813.9955561190. The cubic root of 139570491 is about 518.7178607659.

The spelling of 139570491 in words is "one hundred thirty-nine million, five hundred seventy thousand, four hundred ninety-one".