289490913 has 6 divisors (see below), whose sum is σ = 418153554. Its totient is φ = 192993936.

The previous prime is 289490891. The next prime is 289490951. The reversal of 289490913 is 319094982.

It can be written as a sum of positive squares in only one way, i.e., 288218529 + 1272384 = 16977^2 + 1128^2 .

It is not a de Polignac number, because 289490913 - 2⁵ = 289490881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289490953) 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, 16082820 + ... + 16082837.

It is an arithmetic number, because the mean of its divisors is an integer number (69692259).

Almost surely, 2^289490913 is an apocalyptic number.

It is an amenable number.

289490913 is a deficient number, since it is larger than the sum of its proper divisors (128662641).

289490913 is a wasteful number, since it uses less digits than its factorization.

289490913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32165663 (or 32165660 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 289490913 is about 17014.4324912705. The cubic root of 289490913 is about 661.5230460071.

The spelling of 289490913 in words is "two hundred eighty-nine million, four hundred ninety thousand, nine hundred thirteen".