625780069 has 2 divisors, whose sum is σ = 625780070. Its totient is φ = 625780068.

The previous prime is 625780061. The next prime is 625780073. The reversal of 625780069 is 960087526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 486775969 + 139004100 = 22063^2 + 11790^2 .

It is a cyclic number.

It is not a de Polignac number, because 625780069 - 2³ = 625780061 is a prime.

It is a super-2 number, since 2×625780069² = 783201389515289522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625780061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312890034 + 312890035.

It is an arithmetic number, because the mean of its divisors is an integer number (312890035).

Almost surely, 2^625780069 is an apocalyptic number.

It is an amenable number.

625780069 is a deficient number, since it is larger than the sum of its proper divisors (1).

625780069 is an equidigital number, since it uses as much as digits as its factorization.

625780069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 625780069 is about 25015.5965149744. The cubic root of 625780069 is about 855.3435319144.

The spelling of 625780069 in words is "six hundred twenty-five million, seven hundred eighty thousand, sixty-nine".