47809425 has 12 divisors (see below), whose sum is σ = 79045040. Its totient is φ = 25498320.

The previous prime is 47809393. The next prime is 47809427. The reversal of 47809425 is 52490874.

It is not a de Polignac number, because 47809425 - 2⁵ = 47809393 is a prime.

It is a super-2 number, since 2×47809425² = 4571482237661250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47809427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318655 + ... + 318804.

Almost surely, 2^47809425 is an apocalyptic number.

It is an amenable number.

47809425 is a deficient number, since it is larger than the sum of its proper divisors (31235615).

47809425 is a wasteful number, since it uses less digits than its factorization.

47809425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637472 (or 637467 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 47809425 is about 6914.4359856752. The cubic root of 47809425 is about 362.9425115192.

The spelling of 47809425 in words is "forty-seven million, eight hundred nine thousand, four hundred twenty-five".