264576989 has 2 divisors, whose sum is σ = 264576990. Its totient is φ = 264576988.

The previous prime is 264576943. The next prime is 264576997. The reversal of 264576989 is 989675462.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245172964 + 19404025 = 15658^2 + 4405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264576989 is a prime.

It is a super-2 number, since 2×264576989² = 140001966216612242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264576929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132288494 + 132288495.

It is an arithmetic number, because the mean of its divisors is an integer number (132288495).

Almost surely, 2^264576989 is an apocalyptic number.

It is an amenable number.

264576989 is a deficient number, since it is larger than the sum of its proper divisors (1).

264576989 is an equidigital number, since it uses as much as digits as its factorization.

264576989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 56.

The square root of 264576989 is about 16265.8227274245. The cubic root of 264576989 is about 641.9738774580.

The spelling of 264576989 in words is "two hundred sixty-four million, five hundred seventy-six thousand, nine hundred eighty-nine".