139165899 has 16 divisors (see below), whose sum is σ = 196577280. Its totient is φ = 87328800.

The previous prime is 139165891. The next prime is 139165903. The reversal of 139165899 is 998561931.

It is a happy number.

It is not a de Polignac number, because 139165899 - 2³ = 139165891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139165891) 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, 1174 + ... + 16724.

It is an arithmetic number, because the mean of its divisors is an integer number (12286080).

Almost surely, 2^139165899 is an apocalyptic number.

139165899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

139165899 is a deficient number, since it is larger than the sum of its proper divisors (57411381).

139165899 is a wasteful number, since it uses less digits than its factorization.

139165899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15730.

The product of its digits is 524880, while the sum is 51.

The square root of 139165899 is about 11796.8597092616. The cubic root of 139165899 is about 518.2161496127.

The spelling of 139165899 in words is "one hundred thirty-nine million, one hundred sixty-five thousand, eight hundred ninety-nine".