425887791 has 32 divisors (see below), whose sum is σ = 688762368. Its totient is φ = 228510720.

The previous prime is 425887753. The next prime is 425887817. The reversal of 425887791 is 197788524.

It is not a de Polignac number, because 425887791 - 2⁷ = 425887663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425887741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185571 + ... + 187851.

It is an arithmetic number, because the mean of its divisors is an integer number (21523824).

Almost surely, 2^425887791 is an apocalyptic number.

425887791 is a deficient number, since it is larger than the sum of its proper divisors (262874577).

425887791 is a wasteful number, since it uses less digits than its factorization.

425887791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831.

The product of its digits is 1128960, while the sum is 51.

The square root of 425887791 is about 20637.0489896206. The cubic root of 425887791 is about 752.3704502830.

The spelling of 425887791 in words is "four hundred twenty-five million, eight hundred eighty-seven thousand, seven hundred ninety-one".