616645723 has 2 divisors, whose sum is σ = 616645724. Its totient is φ = 616645722.

The previous prime is 616645697. The next prime is 616645747. The reversal of 616645723 is 327546616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 616645723 - 2⁵ = 616645691 is a prime.

It is not a weakly prime, because it can be changed into another prime (616645753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308322861 + 308322862.

It is an arithmetic number, because the mean of its divisors is an integer number (308322862).

Almost surely, 2^616645723 is an apocalyptic number.

616645723 is a deficient number, since it is larger than the sum of its proper divisors (1).

616645723 is an equidigital number, since it uses as much as digits as its factorization.

616645723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 40.

The square root of 616645723 is about 24832.3523452773. The cubic root of 616645723 is about 851.1613757830.

The spelling of 616645723 in words is "six hundred sixteen million, six hundred forty-five thousand, seven hundred twenty-three".