139570891 has 8 divisors (see below), whose sum is σ = 141732864. Its totient is φ = 137420520.

The previous prime is 139570861. The next prime is 139570913. The reversal of 139570891 is 198075931.

139570891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139570891 - 2⁵ = 139570859 is a prime.

It is a super-2 number, since 2×139570891² = 38960067229067762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139570861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23110 + ... + 28516.

It is an arithmetic number, because the mean of its divisors is an integer number (17716608).

Almost surely, 2^139570891 is an apocalyptic number.

139570891 is a deficient number, since it is larger than the sum of its proper divisors (2161973).

139570891 is an equidigital number, since it uses as much as digits as its factorization.

139570891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5801.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 139570891 is about 11814.0124851805. The cubic root of 139570891 is about 518.7183563027.

The spelling of 139570891 in words is "one hundred thirty-nine million, five hundred seventy thousand, eight hundred ninety-one".