139464961 has 4 divisors (see below), whose sum is σ = 139506624. Its totient is φ = 139423300.

The previous prime is 139464917. The next prime is 139464979. The reversal of 139464961 is 169464931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139464961 - 2⁷ = 139464833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139434961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15325 + ... + 22666.

It is an arithmetic number, because the mean of its divisors is an integer number (34876656).

Almost surely, 2^139464961 is an apocalyptic number.

It is an amenable number.

139464961 is a deficient number, since it is larger than the sum of its proper divisors (41663).

139464961 is an equidigital number, since it uses as much as digits as its factorization.

139464961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41662.

The product of its digits is 139968, while the sum is 43.

The square root of 139464961 is about 11809.5283987126. The cubic root of 139464961 is about 518.5870926794.

The spelling of 139464961 in words is "one hundred thirty-nine million, four hundred sixty-four thousand, nine hundred sixty-one".