616139723 has 8 divisors (see below), whose sum is σ = 624446400. Its totient is φ = 607845888.

The previous prime is 616139683. The next prime is 616139729. The reversal of 616139723 is 327931616.

It is a happy number.

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 616139723 - 2¹⁸ = 615877579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616139729) 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, 129515 + ... + 134187.

It is an arithmetic number, because the mean of its divisors is an integer number (78055800).

Almost surely, 2^616139723 is an apocalyptic number.

616139723 is a deficient number, since it is larger than the sum of its proper divisors (8306677).

616139723 is a wasteful number, since it uses less digits than its factorization.

616139723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421.

The product of its digits is 40824, while the sum is 38.

The square root of 616139723 is about 24822.1619324345. The cubic root of 616139723 is about 850.9285000291.

The spelling of 616139723 in words is "six hundred sixteen million, one hundred thirty-nine thousand, seven hundred twenty-three".