616939 has 4 divisors (see below), whose sum is σ = 624456. Its totient is φ = 609424.

The previous prime is 616933. The next prime is 616943. The reversal of 616939 is 939616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616939 is a prime.

It is a super-2 number, since 2×616939² = 761227459442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616933) 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, 3634 + ... + 3799.

It is an arithmetic number, because the mean of its divisors is an integer number (156114).

2⁶¹⁶⁹³⁹ is an apocalyptic number.

616939 is a deficient number, since it is larger than the sum of its proper divisors (7517).

616939 is an equidigital number, since it uses as much as digits as its factorization.

616939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7516.

The product of its digits is 8748, while the sum is 34.

The square root of 616939 is about 785.4546454125. The cubic root of 616939 is about 85.1296291982.

The spelling of 616939 in words is "six hundred sixteen thousand, nine hundred thirty-nine".