625244689 has 2 divisors, whose sum is σ = 625244690. Its totient is φ = 625244688.

The previous prime is 625244687. The next prime is 625244743. The reversal of 625244689 is 986442526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424030464 + 201214225 = 20592^2 + 14185^2 .

It is a cyclic number.

It is not a de Polignac number, because 625244689 - 2¹ = 625244687 is a prime.

It is a super-2 number, since 2×625244689² = 781861842245413442, which contains 22 as substring.

Together with 625244687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (625244681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312622344 + 312622345.

It is an arithmetic number, because the mean of its divisors is an integer number (312622345).

Almost surely, 2^625244689 is an apocalyptic number.

It is an amenable number.

625244689 is a deficient number, since it is larger than the sum of its proper divisors (1).

625244689 is an equidigital number, since it uses as much as digits as its factorization.

625244689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 46.

The square root of 625244689 is about 25004.8933011121. The cubic root of 625244689 is about 855.0995353952.

The spelling of 625244689 in words is "six hundred twenty-five million, two hundred forty-four thousand, six hundred eighty-nine".