845090725 has 18 divisors (see below), whose sum is σ = 1095471986. Its totient is φ = 646668000.

The previous prime is 845090717. The next prime is 845090731. The reversal of 845090725 is 527090548.

It can be written as a sum of positive squares in 3 ways, for example, as 211964481 + 633126244 = 14559^2 + 25162^2 .

It is not a de Polignac number, because 845090725 - 2³ = 845090717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18726 + ... + 45175.

Almost surely, 2^845090725 is an apocalyptic number.

It is an amenable number.

845090725 is a deficient number, since it is larger than the sum of its proper divisors (250381261).

845090725 is a wasteful number, since it uses less digits than its factorization.

845090725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63957 (or 63929 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 845090725 is about 29070.4441830530. Note that the first 3 decimals coincide. The cubic root of 845090725 is about 945.4410285226.

The spelling of 845090725 in words is "eight hundred forty-five million, ninety thousand, seven hundred twenty-five".