425959809 has 24 divisors (see below), whose sum is σ = 644426496. Its totient is φ = 249823200.

The previous prime is 425959771. The next prime is 425959811. The reversal of 425959809 is 908959524.

It is not a de Polignac number, because 425959809 - 2⁸ = 425959553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (425959819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7674 + ... + 30179.

It is an arithmetic number, because the mean of its divisors is an integer number (26851104).

Almost surely, 2^425959809 is an apocalyptic number.

It is an amenable number.

425959809 is a deficient number, since it is larger than the sum of its proper divisors (218466687).

425959809 is a wasteful number, since it uses less digits than its factorization.

425959809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37909 (or 37898 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 51.

The square root of 425959809 is about 20638.7937874286. The cubic root of 425959809 is about 752.4128567277.

The spelling of 425959809 in words is "four hundred twenty-five million, nine hundred fifty-nine thousand, eight hundred nine".