139961365 has 16 divisors (see below), whose sum is σ = 169706880. Its totient is φ = 110808000.

The previous prime is 139961333. The next prime is 139961383. The reversal of 139961365 is 563169931.

It is not a de Polignac number, because 139961365 - 2⁵ = 139961333 is a prime.

Its product of digits (131220) is a multiple of the sum of its prime divisors (972).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287152 + ... + 287638.

It is an arithmetic number, because the mean of its divisors is an integer number (10606680).

Almost surely, 2^139961365 is an apocalyptic number.

It is an amenable number.

139961365 is a deficient number, since it is larger than the sum of its proper divisors (29745515).

139961365 is a wasteful number, since it uses less digits than its factorization.

139961365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972.

The product of its digits is 131220, while the sum is 43.

The square root of 139961365 is about 11830.5268268154. The cubic root of 139961365 is about 519.2016410265.

The spelling of 139961365 in words is "one hundred thirty-nine million, nine hundred sixty-one thousand, three hundred sixty-five".