431964321 has 4 divisors (see below), whose sum is σ = 575952432. Its totient is φ = 287976212.

The previous prime is 431964319. The next prime is 431964329. The reversal of 431964321 is 123469134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 431964321 - 2¹ = 431964319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (431964329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71994051 + ... + 71994056.

It is an arithmetic number, because the mean of its divisors is an integer number (143988108).

Almost surely, 2^431964321 is an apocalyptic number.

It is an amenable number.

431964321 is a deficient number, since it is larger than the sum of its proper divisors (143988111).

431964321 is a wasteful number, since it uses less digits than its factorization.

431964321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143988110.

The product of its digits is 15552, while the sum is 33.

The square root of 431964321 is about 20783.7513697600. The cubic root of 431964321 is about 755.9318179181.

The spelling of 431964321 in words is "four hundred thirty-one million, nine hundred sixty-four thousand, three hundred twenty-one".