625604489 has 2 divisors, whose sum is σ = 625604490. Its totient is φ = 625604488.

The previous prime is 625604417. The next prime is 625604533. The reversal of 625604489 is 984406526.

It is an a-pointer prime, because the next prime (625604533) can be obtained adding 625604489 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603439225 + 22165264 = 24565^2 + 4708^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625604489 is a prime.

It is a super-2 number, since 2×625604489² = 782761953313902242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625604989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312802244 + 312802245.

It is an arithmetic number, because the mean of its divisors is an integer number (312802245).

Almost surely, 2^625604489 is an apocalyptic number.

It is an amenable number.

625604489 is a deficient number, since it is larger than the sum of its proper divisors (1).

625604489 is an equidigital number, since it uses as much as digits as its factorization.

625604489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 625604489 is about 25012.0868581572. The cubic root of 625604489 is about 855.2635276270.

The spelling of 625604489 in words is "six hundred twenty-five million, six hundred four thousand, four hundred eighty-nine".