425509189 has 24 divisors (see below), whose sum is σ = 512638848. Its totient is φ = 351933120.

The previous prime is 425509187. The next prime is 425509229. The reversal of 425509189 is 981905524.

It is not a de Polignac number, because 425509189 - 2¹ = 425509187 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 (425509181) 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 23 ways as a sum of consecutive naturals, for example, 166854 + ... + 169384.

It is an arithmetic number, because the mean of its divisors is an integer number (21359952).

Almost surely, 2^425509189 is an apocalyptic number.

425509189 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

425509189 is a deficient number, since it is larger than the sum of its proper divisors (87129659).

425509189 is a wasteful number, since it uses less digits than its factorization.

425509189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665 (or 2658 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 425509189 is about 20627.8740785375. The cubic root of 425509189 is about 752.1474389543.

The spelling of 425509189 in words is "four hundred twenty-five million, five hundred nine thousand, one hundred eighty-nine".