431443919 has 4 divisors (see below), whose sum is σ = 431585280. Its totient is φ = 431302560.

The previous prime is 431443891. The next prime is 431443927. The reversal of 431443919 is 919344134.

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 431443919 - 2¹² = 431439823 is a prime.

It is a super-2 number, since 2×431443919² = 372287710484157122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431443949) 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, 65999 + ... + 72240.

It is an arithmetic number, because the mean of its divisors is an integer number (107896320).

Almost surely, 2^431443919 is an apocalyptic number.

431443919 is a deficient number, since it is larger than the sum of its proper divisors (141361).

431443919 is a wasteful number, since it uses less digits than its factorization.

431443919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141360.

The product of its digits is 46656, while the sum is 38.

The square root of 431443919 is about 20771.2281533856. The cubic root of 431443919 is about 755.6281304045.

The spelling of 431443919 in words is "four hundred thirty-one million, four hundred forty-three thousand, nine hundred nineteen".