431998379 has 4 divisors (see below), whose sum is σ = 438446184. Its totient is φ = 425550576.

The previous prime is 431998363. The next prime is 431998381. The reversal of 431998379 is 973899134.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 431998379 - 2⁴ = 431998363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 431998379.

It is not an unprimeable number, because it can be changed into a prime (431998319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3223802 + ... + 3223935.

It is an arithmetic number, because the mean of its divisors is an integer number (109611546).

Almost surely, 2^431998379 is an apocalyptic number.

431998379 is a deficient number, since it is larger than the sum of its proper divisors (6447805).

431998379 is an equidigital number, since it uses as much as digits as its factorization.

431998379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447804.

The product of its digits is 1469664, while the sum is 53.

The square root of 431998379 is about 20784.5706955905. The cubic root of 431998379 is about 755.9516844117.

The spelling of 431998379 in words is "four hundred thirty-one million, nine hundred ninety-eight thousand, three hundred seventy-nine".