139664289 has 8 divisors (see below), whose sum is σ = 186619680. Its totient is φ = 92909216.

The previous prime is 139664263. The next prime is 139664297. The reversal of 139664289 is 982466931.

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 139664289 - 2²⁴ = 122887073 is a prime.

It is a super-2 number, since 2×139664289² = 39012227243751042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139664389) 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, 48444 + ... + 51245.

It is an arithmetic number, because the mean of its divisors is an integer number (23327460).

Almost surely, 2^139664289 is an apocalyptic number.

It is an amenable number.

139664289 is a deficient number, since it is larger than the sum of its proper divisors (46955391).

139664289 is an equidigital number, since it uses as much as digits as its factorization.

139664289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100159.

The product of its digits is 559872, while the sum is 48.

The square root of 139664289 is about 11817.9646724806. The cubic root of 139664289 is about 518.8340357592.

The spelling of 139664289 in words is "one hundred thirty-nine million, six hundred sixty-four thousand, two hundred eighty-nine".