617870449 has 27 divisors (see below), whose sum is σ = 743661387. Its totient is φ = 511855344.

The previous prime is 617870431. The next prime is 617870497. The reversal of 617870449 is 944078716.

The square root of 617870449 is 24857.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 445421025 + 172449424 = 21105^2 + 13132^2 .

It is not a de Polignac number, because 617870449 - 2⁵ = 617870417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 617870399 and 617870408.

It is not an unprimeable number, because it can be changed into a prime (617870419) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9221914 + ... + 9221980.

Almost surely, 2^617870449 is an apocalyptic number.

617870449 is the 24857-th square number.

617870449 is the 12429-th centered octagonal number.

It is an amenable number.

617870449 is a deficient number, since it is larger than the sum of its proper divisors (125790938).

617870449 is an frugal number, since it uses more digits than its factorization.

617870449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The cubic root of 617870449 is about 851.7245030675.

The spelling of 617870449 in words is "six hundred seventeen million, eight hundred seventy thousand, four hundred forty-nine".