139015139 has 4 divisors (see below), whose sum is σ = 139061520. Its totient is φ = 138968760.

The previous prime is 139015117. The next prime is 139015181. The reversal of 139015139 is 931510931.

It is a happy number.

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 139015139 - 2²⁴ = 122237923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139015109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18359 + ... + 24800.

It is an arithmetic number, because the mean of its divisors is an integer number (34765380).

Almost surely, 2^139015139 is an apocalyptic number.

139015139 is a deficient number, since it is larger than the sum of its proper divisors (46381).

139015139 is an equidigital number, since it uses as much as digits as its factorization.

139015139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46380.

The product of its (nonzero) digits is 3645, while the sum is 32.

The square root of 139015139 is about 11790.4681416812. The cubic root of 139015139 is about 518.0289521839.

The spelling of 139015139 in words is "one hundred thirty-nine million, fifteen thousand, one hundred thirty-nine".