139718655 has 16 divisors (see below), whose sum is σ = 248388960. Its totient is φ = 74516544.

The previous prime is 139718633. The next prime is 139718659. The reversal of 139718655 is 556817931.

It is a happy number.

It is not a de Polignac number, because 139718655 - 2¹⁴ = 139702271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 139718655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139718659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517342 + ... + 517611.

It is an arithmetic number, because the mean of its divisors is an integer number (15524310).

Almost surely, 2^139718655 is an apocalyptic number.

139718655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139718655 is a deficient number, since it is larger than the sum of its proper divisors (108670305).

139718655 is a wasteful number, since it uses less digits than its factorization.

139718655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034967 (or 1034961 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 139718655 is about 11820.2645909472. The cubic root of 139718655 is about 518.9013478168.

The spelling of 139718655 in words is "one hundred thirty-nine million, seven hundred eighteen thousand, six hundred fifty-five".