625145789 has 2 divisors, whose sum is σ = 625145790. Its totient is φ = 625145788.

The previous prime is 625145761. The next prime is 625145797. The reversal of 625145789 is 987541526.

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., 372876100 + 252269689 = 19310^2 + 15883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625145789 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625145749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312572894 + 312572895.

It is an arithmetic number, because the mean of its divisors is an integer number (312572895).

Almost surely, 2^625145789 is an apocalyptic number.

It is an amenable number.

625145789 is a deficient number, since it is larger than the sum of its proper divisors (1).

625145789 is an equidigital number, since it uses as much as digits as its factorization.

625145789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 47.

The square root of 625145789 is about 25002.9156099844. The cubic root of 625145789 is about 855.0544470189.

The spelling of 625145789 in words is "six hundred twenty-five million, one hundred forty-five thousand, seven hundred eighty-nine".