139708961 has 8 divisors (see below), whose sum is σ = 160080960. Its totient is φ = 119440368.

The previous prime is 139708951. The next prime is 139708993. The reversal of 139708961 is 169807931.

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 139708961 - 2¹⁰ = 139707937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139708931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22931 + ... + 28376.

It is an arithmetic number, because the mean of its divisors is an integer number (20010120).

Almost surely, 2^139708961 is an apocalyptic number.

It is an amenable number.

139708961 is a deficient number, since it is larger than the sum of its proper divisors (20371999).

139708961 is an equidigital number, since it uses as much as digits as its factorization.

139708961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51703.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 139708961 is about 11819.8545253315. The cubic root of 139708961 is about 518.8893466849.

The spelling of 139708961 in words is "one hundred thirty-nine million, seven hundred eight thousand, nine hundred sixty-one".