809430925 has 48 divisors (see below), whose sum is σ = 1074788352. Its totient is φ = 603691200.

The previous prime is 809430901. The next prime is 809430929. The reversal of 809430925 is 529034908.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-809430925 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809430929) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3565662 + ... + 3565888.

It is an arithmetic number, because the mean of its divisors is an integer number (22391424).

Almost surely, 2^809430925 is an apocalyptic number.

It is an amenable number.

809430925 is a deficient number, since it is larger than the sum of its proper divisors (265357427).

809430925 is a wasteful number, since it uses less digits than its factorization.

809430925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 809430925 is about 28450.4995562468. The cubic root of 809430925 is about 931.9513983786.

The spelling of 809430925 in words is "eight hundred nine million, four hundred thirty thousand, nine hundred twenty-five".