139365961 has 8 divisors (see below), whose sum is σ = 160853184. Its totient is φ = 118273200.

The previous prime is 139365959. The next prime is 139365973. The reversal of 139365961 is 169563931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139365961 - 2¹ = 139365959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139365911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97855 + ... + 99268.

It is an arithmetic number, because the mean of its divisors is an integer number (20106648).

Almost surely, 2^139365961 is an apocalyptic number.

It is an amenable number.

139365961 is a deficient number, since it is larger than the sum of its proper divisors (21487223).

139365961 is a wasteful number, since it uses less digits than its factorization.

139365961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197231.

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

The square root of 139365961 is about 11805.3361239738. The cubic root of 139365961 is about 518.4643562955.

The spelling of 139365961 in words is "one hundred thirty-nine million, three hundred sixty-five thousand, nine hundred sixty-one".