625521089 has 2 divisors, whose sum is σ = 625521090. Its totient is φ = 625521088.

The previous prime is 625521079. The next prime is 625521119. The reversal of 625521089 is 980125526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376670464 + 248850625 = 19408^2 + 15775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625521089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625521079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312760544 + 312760545.

It is an arithmetic number, because the mean of its divisors is an integer number (312760545).

Almost surely, 2^625521089 is an apocalyptic number.

It is an amenable number.

625521089 is a deficient number, since it is larger than the sum of its proper divisors (1).

625521089 is an equidigital number, since it uses as much as digits as its factorization.

625521089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 625521089 is about 25010.4196086351. The cubic root of 625521089 is about 855.2255205745.

The spelling of 625521089 in words is "six hundred twenty-five million, five hundred twenty-one thousand, eighty-nine".