616969139 has 4 divisors (see below), whose sum is σ = 617112024. Its totient is φ = 616826256.

The previous prime is 616969127. The next prime is 616969163. The reversal of 616969139 is 931969616.

It is a happy number.

616969139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 616969139 - 2¹² = 616965043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616969109) 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, 64757 + ... + 73670.

It is an arithmetic number, because the mean of its divisors is an integer number (154278006).

Almost surely, 2^616969139 is an apocalyptic number.

616969139 is a deficient number, since it is larger than the sum of its proper divisors (142885).

616969139 is a wasteful number, since it uses less digits than its factorization.

616969139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142884.

The product of its digits is 472392, while the sum is 50.

The square root of 616969139 is about 24838.8634804413. The cubic root of 616969139 is about 851.3101544012.

The spelling of 616969139 in words is "six hundred sixteen million, nine hundred sixty-nine thousand, one hundred thirty-nine".