625097905 has 16 divisors (see below), whose sum is σ = 805130064. Its totient is φ = 464209920.

The previous prime is 625097903. The next prime is 625097911. The reversal of 625097905 is 509790526.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4490161 + 620607744 = 2119^2 + 24912^2 .

It is not a de Polignac number, because 625097905 - 2¹ = 625097903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (625097903) 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 in 15 ways as a sum of consecutive naturals, for example, 44166 + ... + 56575.

It is an arithmetic number, because the mean of its divisors is an integer number (50320629).

Almost surely, 2^625097905 is an apocalyptic number.

It is an amenable number.

625097905 is a deficient number, since it is larger than the sum of its proper divisors (180032159).

625097905 is a wasteful number, since it uses less digits than its factorization.

625097905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100836.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 625097905 is about 25001.9580233229. The cubic root of 625097905 is about 855.0326150594.

The spelling of 625097905 in words is "six hundred twenty-five million, ninety-seven thousand, nine hundred five".