425249979 has 48 divisors (see below), whose sum is σ = 722413440. Its totient is φ = 220026240.

The previous prime is 425249947. The next prime is 425249983. The reversal of 425249979 is 979942524.

It is not a de Polignac number, because 425249979 - 2⁵ = 425249947 is a prime.

Its product of digits (1632960) is a multiple of the sum of its prime factors (1080).

It is not an unprimeable number, because it can be changed into a prime (425249479) 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, 661032 + ... + 661674.

It is an arithmetic number, because the mean of its divisors is an integer number (15050280).

Almost surely, 2^425249979 is an apocalyptic number.

425249979 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

425249979 is a deficient number, since it is larger than the sum of its proper divisors (297163461).

425249979 is a wasteful number, since it uses less digits than its factorization.

425249979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080 (or 1073 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The square root of 425249979 is about 20621.5901181262. The cubic root of 425249979 is about 751.9946778662.

The spelling of 425249979 in words is "four hundred twenty-five million, two hundred forty-nine thousand, nine hundred seventy-nine".