425878489 has 4 divisors (see below), whose sum is σ = 425949156. Its totient is φ = 425807824.

The previous prime is 425878463. The next prime is 425878501. The reversal of 425878489 is 984878524.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 242736400 + 183142089 = 15580^2 + 13533^2 .

It is a cyclic number.

It is not a de Polignac number, because 425878489 - 2⁵ = 425878457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425878429) 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, 25354 + ... + 38659.

It is an arithmetic number, because the mean of its divisors is an integer number (106487289).

Almost surely, 2^425878489 is an apocalyptic number.

It is an amenable number.

425878489 is a deficient number, since it is larger than the sum of its proper divisors (70667).

425878489 is an equidigital number, since it uses as much as digits as its factorization.

425878489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70666.

The product of its digits is 5160960, while the sum is 55.

The square root of 425878489 is about 20636.8236170201. The cubic root of 425878489 is about 752.3649726267.

It can be divided in two parts, 42587 and 8489, that added together give a square (51076 = 226²).

The spelling of 425878489 in words is "four hundred twenty-five million, eight hundred seventy-eight thousand, four hundred eighty-nine".