425239663 has 4 divisors (see below), whose sum is σ = 443728368. Its totient is φ = 406750960.

The previous prime is 425239651. The next prime is 425239667. The reversal of 425239663 is 366932524.

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-425239663 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 (425239667) 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, 9244318 + ... + 9244363.

It is an arithmetic number, because the mean of its divisors is an integer number (110932092).

Almost surely, 2^425239663 is an apocalyptic number.

425239663 is a deficient number, since it is larger than the sum of its proper divisors (18488705).

425239663 is a wasteful number, since it uses less digits than its factorization.

425239663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18488704.

The product of its digits is 233280, while the sum is 40.

The square root of 425239663 is about 20621.3399904080. The cubic root of 425239663 is about 751.9885970194.

The spelling of 425239663 in words is "four hundred twenty-five million, two hundred thirty-nine thousand, six hundred sixty-three".