625579081 has 2 divisors, whose sum is σ = 625579082. Its totient is φ = 625579080.

The previous prime is 625579069. The next prime is 625579099. The reversal of 625579081 is 180975526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 604373056 + 21206025 = 24584^2 + 4605^2 .

It is a cyclic number.

It is not a de Polignac number, because 625579081 - 2¹³ = 625570889 is a prime.

It is a super-2 number, since 2×625579081² = 782698373169609122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (625579181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312789540 + 312789541.

It is an arithmetic number, because the mean of its divisors is an integer number (312789541).

Almost surely, 2^625579081 is an apocalyptic number.

It is an amenable number.

625579081 is a deficient number, since it is larger than the sum of its proper divisors (1).

625579081 is an equidigital number, since it uses as much as digits as its factorization.

625579081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 625579081 is about 25011.5789385636. The cubic root of 625579081 is about 855.2519490497.

The spelling of 625579081 in words is "six hundred twenty-five million, five hundred seventy-nine thousand, eighty-one".