431338296491 has 4 divisors (see below), whose sum is σ = 433721381184. Its totient is φ = 428955211800.

The previous prime is 431338296437. The next prime is 431338296509. The reversal of 431338296491 is 194692833134.

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-431338296491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431338296421) 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, 1191542075 + ... + 1191542436.

It is an arithmetic number, because the mean of its divisors is an integer number (108430345296).

Almost surely, 2^431338296491 is an apocalyptic number.

431338296491 is a deficient number, since it is larger than the sum of its proper divisors (2383084693).

431338296491 is a wasteful number, since it uses less digits than its factorization.

431338296491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383084692.

The product of its digits is 3359232, while the sum is 53.

The spelling of 431338296491 in words is "four hundred thirty-one billion, three hundred thirty-eight million, two hundred ninety-six thousand, four hundred ninety-one".