625550089 has 2 divisors, whose sum is σ = 625550090. Its totient is φ = 625550088.

The previous prime is 625550087. The next prime is 625550143. The reversal of 625550089 is 980055526.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 618367689 + 7182400 = 24867^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 625550089 - 2¹ = 625550087 is a prime.

Together with 625550087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (625550087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312775044 + 312775045.

It is an arithmetic number, because the mean of its divisors is an integer number (312775045).

Almost surely, 2^625550089 is an apocalyptic number.

It is an amenable number.

625550089 is a deficient number, since it is larger than the sum of its proper divisors (1).

625550089 is an equidigital number, since it uses as much as digits as its factorization.

625550089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 625550089 is about 25010.9993602815. Note that the first 3 decimals coincide. The cubic root of 625550089 is about 855.2387368391.

The spelling of 625550089 in words is "six hundred twenty-five million, five hundred fifty thousand, eighty-nine".