617374721 has 6 divisors (see below), whose sum is σ = 623558166. Its totient is φ = 611252000.

The previous prime is 617374691. The next prime is 617374729. The reversal of 617374721 is 127473716.

It can be written as a sum of positive squares in 3 ways, for example, as 308880625 + 308494096 = 17575^2 + 17564^2 .

It is not a de Polignac number, because 617374721 - 2¹⁰ = 617373697 is a prime.

It is a super-2 number, since 2×617374721² = 762303092259655682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617374729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20060 + ... + 40461.

It is an arithmetic number, because the mean of its divisors is an integer number (103926361).

Almost surely, 2^617374721 is an apocalyptic number.

It is an amenable number.

617374721 is a deficient number, since it is larger than the sum of its proper divisors (6183445).

617374721 is an equidigital number, since it uses as much as digits as its factorization.

617374721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60723 (or 60622 counting only the distinct ones).

The product of its digits is 49392, while the sum is 38.

The square root of 617374721 is about 24847.0264015636. The cubic root of 617374721 is about 851.4966577565.

The spelling of 617374721 in words is "six hundred seventeen million, three hundred seventy-four thousand, seven hundred twenty-one".