616723617 has 4 divisors (see below), whose sum is σ = 822298160. Its totient is φ = 411149076.

The previous prime is 616723609. The next prime is 616723621. The reversal of 616723617 is 716327616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 616723617 - 2³ = 616723609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (616723607) 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, 102787267 + ... + 102787272.

It is an arithmetic number, because the mean of its divisors is an integer number (205574540).

Almost surely, 2^616723617 is an apocalyptic number.

It is an amenable number.

616723617 is a deficient number, since it is larger than the sum of its proper divisors (205574543).

616723617 is a wasteful number, since it uses less digits than its factorization.

616723617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205574542.

The product of its digits is 63504, while the sum is 39.

The square root of 616723617 is about 24833.9206932776. The cubic root of 616723617 is about 851.1972135259.

The spelling of 616723617 in words is "six hundred sixteen million, seven hundred twenty-three thousand, six hundred seventeen".