139052791 has 4 divisors (see below), whose sum is σ = 139081072. Its totient is φ = 139024512.

The previous prime is 139052759. The next prime is 139052807. The reversal of 139052791 is 197250931.

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

It is a cyclic number.

It is not a de Polignac number, because 139052791 - 2⁵ = 139052759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139052791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139052731) 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, 4635 + ... + 17308.

It is an arithmetic number, because the mean of its divisors is an integer number (34770268).

Almost surely, 2^139052791 is an apocalyptic number.

139052791 is a deficient number, since it is larger than the sum of its proper divisors (28281).

139052791 is an equidigital number, since it uses as much as digits as its factorization.

139052791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28280.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 139052791 is about 11792.0647471085. The cubic root of 139052791 is about 518.0757170316.

The spelling of 139052791 in words is "one hundred thirty-nine million, fifty-two thousand, seven hundred ninety-one".