517648989 has 64 divisors (see below), whose sum is σ = 835946496. Its totient is φ = 280800000.

The previous prime is 517648973. The next prime is 517648991. The reversal of 517648989 is 989846715.

It is not a de Polignac number, because 517648989 - 2⁴ = 517648973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517648919) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3428064 + ... + 3428214.

It is an arithmetic number, because the mean of its divisors is an integer number (13061664).

Almost surely, 2^517648989 is an apocalyptic number.

It is an amenable number.

517648989 is a deficient number, since it is larger than the sum of its proper divisors (318297507).

517648989 is a wasteful number, since it uses less digits than its factorization.

517648989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370.

The product of its digits is 4354560, while the sum is 57.

The square root of 517648989 is about 22751.9007777372. The cubic root of 517648989 is about 802.9314270699.

The spelling of 517648989 in words is "five hundred seventeen million, six hundred forty-eight thousand, nine hundred eighty-nine".