139118087 has 4 divisors (see below), whose sum is σ = 139199736. Its totient is φ = 139036440.

The previous prime is 139118069. The next prime is 139118093. The reversal of 139118087 is 780811931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780811931 = 43 ⋅18158417.

It is a cyclic number.

It is not a de Polignac number, because 139118087 - 2⁸ = 139117831 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 139118087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139111087) 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 3 ways as a sum of consecutive naturals, for example, 38213 + ... + 41694.

It is an arithmetic number, because the mean of its divisors is an integer number (34799934).

Almost surely, 2^139118087 is an apocalyptic number.

139118087 is a deficient number, since it is larger than the sum of its proper divisors (81649).

139118087 is an equidigital number, since it uses as much as digits as its factorization.

139118087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81648.

The product of its (nonzero) digits is 12096, while the sum is 38.

The square root of 139118087 is about 11794.8330636767. The cubic root of 139118087 is about 518.1567964983.

The spelling of 139118087 in words is "one hundred thirty-nine million, one hundred eighteen thousand, eighty-seven".