431383509943 has 4 divisors (see below), whose sum is σ = 441905059008. Its totient is φ = 420861960880.

The previous prime is 431383509937. The next prime is 431383509967. The reversal of 431383509943 is 349905383134.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431383509943 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 (431383509923) 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, 5260774471 + ... + 5260774552.

It is an arithmetic number, because the mean of its divisors is an integer number (110476264752).

Almost surely, 2^431383509943 is an apocalyptic number.

431383509943 is a deficient number, since it is larger than the sum of its proper divisors (10521549065).

431383509943 is a wasteful number, since it uses less digits than its factorization.

431383509943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10521549064.

The product of its (nonzero) digits is 4199040, while the sum is 52.

The spelling of 431383509943 in words is "four hundred thirty-one billion, three hundred eighty-three million, five hundred nine thousand, nine hundred forty-three".