431321879 has 4 divisors (see below), whose sum is σ = 445235520. Its totient is φ = 417408240.

The previous prime is 431321851. The next prime is 431321881. The reversal of 431321879 is 978123134.

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 431321879 - 2⁸ = 431321623 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 (431321819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6956774 + ... + 6956835.

It is an arithmetic number, because the mean of its divisors is an integer number (111308880).

Almost surely, 2^431321879 is an apocalyptic number.

431321879 is a deficient number, since it is larger than the sum of its proper divisors (13913641).

431321879 is a wasteful number, since it uses less digits than its factorization.

431321879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13913640.

The product of its digits is 36288, while the sum is 38.

The square root of 431321879 is about 20768.2902281339. The cubic root of 431321879 is about 755.5568769929.

The spelling of 431321879 in words is "four hundred thirty-one million, three hundred twenty-one thousand, eight hundred seventy-nine".