617911489 has 6 divisors (see below), whose sum is σ = 669099606. Its totient is φ = 570379680.

The previous prime is 617911477. The next prime is 617911513. The reversal of 617911489 is 984119716.

It can be written as a sum of positive squares in 3 ways, for example, as 69555600 + 548355889 = 8340^2 + 23417^2 .

It is not a de Polignac number, because 617911489 - 2⁷ = 617911361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617911409) 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, 1827972 + ... + 1828309.

It is an arithmetic number, because the mean of its divisors is an integer number (111516601).

Almost surely, 2^617911489 is an apocalyptic number.

It is an amenable number.

617911489 is a deficient number, since it is larger than the sum of its proper divisors (51188117).

617911489 is a wasteful number, since it uses less digits than its factorization.

617911489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656307 (or 3656294 counting only the distinct ones).

The product of its digits is 108864, while the sum is 46.

The square root of 617911489 is about 24857.8255082781. The cubic root of 617911489 is about 851.7433603106.

The spelling of 617911489 in words is "six hundred seventeen million, nine hundred eleven thousand, four hundred eighty-nine".