616591247 has 4 divisors (see below), whose sum is σ = 619307736. Its totient is φ = 613874760.

The previous prime is 616591231. The next prime is 616591253. The reversal of 616591247 is 742195616.

616591247 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 616591247 - 2⁴ = 616591231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616591447) 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, 1357904 + ... + 1358357.

It is an arithmetic number, because the mean of its divisors is an integer number (154826934).

Almost surely, 2^616591247 is an apocalyptic number.

616591247 is a deficient number, since it is larger than the sum of its proper divisors (2716489).

616591247 is a wasteful number, since it uses less digits than its factorization.

616591247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716488.

The product of its digits is 90720, while the sum is 41.

The square root of 616591247 is about 24831.2554455066. The cubic root of 616591247 is about 851.1363104816.

The spelling of 616591247 in words is "six hundred sixteen million, five hundred ninety-one thousand, two hundred forty-seven".