625601489 has 2 divisors, whose sum is σ = 625601490. Its totient is φ = 625601488.

The previous prime is 625601477. The next prime is 625601491. The reversal of 625601489 is 984106526.

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., 618268225 + 7333264 = 24865^2 + 2708^2 .

It is a cyclic number.

It is not a de Polignac number, because 625601489 - 2⁸ = 625601233 is a prime.

Together with 625601491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625601419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312800744 + 312800745.

It is an arithmetic number, because the mean of its divisors is an integer number (312800745).

Almost surely, 2^625601489 is an apocalyptic number.

It is an amenable number.

625601489 is a deficient number, since it is larger than the sum of its proper divisors (1).

625601489 is an equidigital number, since it uses as much as digits as its factorization.

625601489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 625601489 is about 25012.0268870797. The cubic root of 625601489 is about 855.2621605254.

The spelling of 625601489 in words is "six hundred twenty-five million, six hundred one thousand, four hundred eighty-nine".