431318491 has 2 divisors, whose sum is σ = 431318492. Its totient is φ = 431318490.

The previous prime is 431318477. The next prime is 431318507. The reversal of 431318491 is 194813134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431318491 - 2¹¹ = 431316443 is a prime.

It is not a weakly prime, because it can be changed into another prime (431318291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215659245 + 215659246.

It is an arithmetic number, because the mean of its divisors is an integer number (215659246).

Almost surely, 2^431318491 is an apocalyptic number.

431318491 is a deficient number, since it is larger than the sum of its proper divisors (1).

431318491 is an equidigital number, since it uses as much as digits as its factorization.

431318491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 431318491 is about 20768.2086613169. The cubic root of 431318491 is about 755.5548987075.

The spelling of 431318491 in words is "four hundred thirty-one million, three hundred eighteen thousand, four hundred ninety-one".