651117289 has 27 divisors (see below), whose sum is σ = 739348407. Its totient is φ = 573213888.

The previous prime is 651117263. The next prime is 651117301. The reversal of 651117289 is 982711156.

It is a happy number.

The square root of 651117289 is 25517.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 506925225 + 144192064 = 22515^2 + 12008^2 .

It is not a de Polignac number, because 651117289 - 2⁷ = 651117161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651117209) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8241952 + ... + 8242030.

Almost surely, 2^651117289 is an apocalyptic number.

651117289 is the 25517-th square number.

651117289 is the 12759-th centered octagonal number.

It is an amenable number.

651117289 is a deficient number, since it is larger than the sum of its proper divisors (88231118).

651117289 is an equidigital number, since it uses as much as digits as its factorization.

651117289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 115 counting only the distinct ones).

The product of its digits is 30240, while the sum is 40.

The cubic root of 651117289 is about 866.7351491414.

The spelling of 651117289 in words is "six hundred fifty-one million, one hundred seventeen thousand, two hundred eighty-nine".