289490513 has 4 divisors (see below), whose sum is σ = 311759028. Its totient is φ = 267222000.

The previous prime is 289490507. The next prime is 289490527. The reversal of 289490513 is 315094982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315094982 = 2 ⋅157547491.

It can be written as a sum of positive squares in 2 ways, for example, as 46348864 + 243141649 = 6808^2 + 15593^2 .

It is a cyclic number.

It is not a de Polignac number, because 289490513 - 2⁶ = 289490449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289490503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11134238 + ... + 11134263.

It is an arithmetic number, because the mean of its divisors is an integer number (77939757).

Almost surely, 2^289490513 is an apocalyptic number.

It is an amenable number.

289490513 is a deficient number, since it is larger than the sum of its proper divisors (22268515).

289490513 is a wasteful number, since it uses less digits than its factorization.

289490513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22268514.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 289490513 is about 17014.4207365399. The cubic root of 289490513 is about 661.5227413236.

The spelling of 289490513 in words is "two hundred eighty-nine million, four hundred ninety thousand, five hundred thirteen".