139813655 has 4 divisors (see below), whose sum is σ = 167776392. Its totient is φ = 111850920.

The previous prime is 139813651. The next prime is 139813691. The reversal of 139813655 is 556318931.

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

It is not a de Polignac number, because 139813655 - 2² = 139813651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139813651) 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, 13981361 + ... + 13981370.

It is an arithmetic number, because the mean of its divisors is an integer number (41944098).

Almost surely, 2^139813655 is an apocalyptic number.

139813655 is a deficient number, since it is larger than the sum of its proper divisors (27962737).

139813655 is an equidigital number, since it uses as much as digits as its factorization.

139813655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27962736.

The product of its digits is 97200, while the sum is 41.

The square root of 139813655 is about 11824.2824306594. The cubic root of 139813655 is about 519.0189280583.

The spelling of 139813655 in words is "one hundred thirty-nine million, eight hundred thirteen thousand, six hundred fifty-five".