625050091 has 2 divisors, whose sum is σ = 625050092. Its totient is φ = 625050090.

The previous prime is 625050073. The next prime is 625050109. The reversal of 625050091 is 190050526.

Together with next prime (625050109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (625050073) and next prime (625050109).

It is a cyclic number.

It is not a de Polignac number, because 625050091 - 2¹⁷ = 624919019 is a prime.

It is not a weakly prime, because it can be changed into another prime (625050031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312525045 + 312525046.

It is an arithmetic number, because the mean of its divisors is an integer number (312525046).

Almost surely, 2^625050091 is an apocalyptic number.

625050091 is a deficient number, since it is larger than the sum of its proper divisors (1).

625050091 is an equidigital number, since it uses as much as digits as its factorization.

625050091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 625050091 is about 25001.0017999279. The cubic root of 625050091 is about 855.0108139029.

The spelling of 625050091 in words is "six hundred twenty-five million, fifty thousand, ninety-one".