139056897 has 16 divisors (see below), whose sum is σ = 214801280. Its totient is φ = 78371712.

The previous prime is 139056857. The next prime is 139056899. The reversal of 139056897 is 798650931.

It is not a de Polignac number, because 139056897 - 2⁶ = 139056833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139056899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43822 + ... + 46887.

It is an arithmetic number, because the mean of its divisors is an integer number (13425080).

Almost surely, 2^139056897 is an apocalyptic number.

It is an amenable number.

139056897 is a deficient number, since it is larger than the sum of its proper divisors (75744383).

139056897 is an equidigital number, since it uses as much as digits as its factorization.

139056897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90792.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 139056897 is about 11792.2388459529. The cubic root of 139056897 is about 518.0808162891.

It can be divided in two parts, 13905 and 6897, that added together give a palindrome (20802).

The spelling of 139056897 in words is "one hundred thirty-nine million, fifty-six thousand, eight hundred ninety-seven".