625030561 has 2 divisors, whose sum is σ = 625030562. Its totient is φ = 625030560.

The previous prime is 625030559. The next prime is 625030577. The reversal of 625030561 is 165030526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499254336 + 125776225 = 22344^2 + 11215^2 .

It is a cyclic number.

It is not a de Polignac number, because 625030561 - 2¹ = 625030559 is a prime.

Together with 625030559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (625030661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312515280 + 312515281.

It is an arithmetic number, because the mean of its divisors is an integer number (312515281).

Almost surely, 2^625030561 is an apocalyptic number.

It is an amenable number.

625030561 is a deficient number, since it is larger than the sum of its proper divisors (1).

625030561 is an equidigital number, since it uses as much as digits as its factorization.

625030561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 625030561 is about 25000.6112125284. The cubic root of 625030561 is about 855.0019087312.

The spelling of 625030561 in words is "six hundred twenty-five million, thirty thousand, five hundred sixty-one".