139615655 has 4 divisors (see below), whose sum is σ = 167538792. Its totient is φ = 111692520.

The previous prime is 139615643. The next prime is 139615699. The reversal of 139615655 is 556516931.

It is a happy number.

139615655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 139615655 - 2¹² = 139611559 is a prime.

It is a super-2 number, since 2×139615655² = 38985062242158050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13961561 + ... + 13961570.

It is an arithmetic number, because the mean of its divisors is an integer number (41884698).

Almost surely, 2^139615655 is an apocalyptic number.

139615655 is a deficient number, since it is larger than the sum of its proper divisors (27923137).

139615655 is an equidigital number, since it uses as much as digits as its factorization.

139615655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27923136.

The product of its digits is 121500, while the sum is 41.

The square root of 139615655 is about 11815.9068632077. The cubic root of 139615655 is about 518.7738058461.

The spelling of 139615655 in words is "one hundred thirty-nine million, six hundred fifteen thousand, six hundred fifty-five".