625464569 has 2 divisors, whose sum is σ = 625464570. Its totient is φ = 625464568.

The previous prime is 625464533. The next prime is 625464577. The reversal of 625464569 is 965464526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423824569 + 201640000 = 20587^2 + 14200^2 .

It is a cyclic number.

It is not a de Polignac number, because 625464569 - 2⁸ = 625464313 is a prime.

It is a super-2 number, since 2×625464569² = 782411854148711522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625464589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312732284 + 312732285.

It is an arithmetic number, because the mean of its divisors is an integer number (312732285).

Almost surely, 2^625464569 is an apocalyptic number.

It is an amenable number.

625464569 is a deficient number, since it is larger than the sum of its proper divisors (1).

625464569 is an equidigital number, since it uses as much as digits as its factorization.

625464569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 47.

The square root of 625464569 is about 25009.2896540466. The cubic root of 625464569 is about 855.1997613564.

The spelling of 625464569 in words is "six hundred twenty-five million, four hundred sixty-four thousand, five hundred sixty-nine".