617890964 has 6 divisors (see below), whose sum is σ = 1081309194. Its totient is φ = 308945480.

The previous prime is 617890939. The next prime is 617890979. The reversal of 617890964 is 469098716.

It can be written as a sum of positive squares in only one way, i.e., 473410564 + 144480400 = 21758^2 + 12020^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77236367 + ... + 77236374.

It is an arithmetic number, because the mean of its divisors is an integer number (180218199).

Almost surely, 2^617890964 is an apocalyptic number.

It is an amenable number.

617890964 is a deficient number, since it is larger than the sum of its proper divisors (463418230).

617890964 is a wasteful number, since it uses less digits than its factorization.

617890964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154472745 (or 154472743 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 617890964 is about 24857.4126569923. The cubic root of 617890964 is about 851.7339294960.

The spelling of 617890964 in words is "six hundred seventeen million, eight hundred ninety thousand, nine hundred sixty-four".