431352389 has 8 divisors (see below), whose sum is σ = 467284440. Its totient is φ = 398169408.

The previous prime is 431352379. The next prime is 431352391. The reversal of 431352389 is 983253134.

It can be written as a sum of positive squares in 4 ways, for example, as 57123364 + 374229025 = 7558^2 + 19345^2 .

It is a de Polignac number, because none of the positive numbers 2^k-431352389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431352359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95972 + ... + 100365.

It is an arithmetic number, because the mean of its divisors is an integer number (58410555).

Almost surely, 2^431352389 is an apocalyptic number.

It is an amenable number.

431352389 is a deficient number, since it is larger than the sum of its proper divisors (35932051).

431352389 is an equidigital number, since it uses as much as digits as its factorization.

431352389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196376 (or 196350 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 431352389 is about 20769.0247484084. The cubic root of 431352389 is about 755.5746916057.

The spelling of 431352389 in words is "four hundred thirty-one million, three hundred fifty-two thousand, three hundred eighty-nine".