425849663 has 4 divisors (see below), whose sum is σ = 426133008. Its totient is φ = 425566320.

The previous prime is 425849639. The next prime is 425849719. The reversal of 425849663 is 366948524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425849663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425849063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139406 + ... + 142427.

It is an arithmetic number, because the mean of its divisors is an integer number (106533252).

Almost surely, 2^425849663 is an apocalyptic number.

425849663 is a deficient number, since it is larger than the sum of its proper divisors (283345).

425849663 is a wasteful number, since it uses less digits than its factorization.

425849663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283344.

The product of its digits is 1244160, while the sum is 47.

The square root of 425849663 is about 20636.1251934563. The cubic root of 425849663 is about 752.3479973919.

The spelling of 425849663 in words is "four hundred twenty-five million, eight hundred forty-nine thousand, six hundred sixty-three".