431491867 has 2 divisors, whose sum is σ = 431491868. Its totient is φ = 431491866.

The previous prime is 431491811. The next prime is 431491889. The reversal of 431491867 is 768194134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 431491867 - 2²⁷ = 297274139 is a prime.

It is not a weakly prime, because it can be changed into another prime (431491967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215745933 + 215745934.

It is an arithmetic number, because the mean of its divisors is an integer number (215745934).

Almost surely, 2^431491867 is an apocalyptic number.

431491867 is a deficient number, since it is larger than the sum of its proper divisors (1).

431491867 is an equidigital number, since it uses as much as digits as its factorization.

431491867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 431491867 is about 20772.3823140246. The cubic root of 431491867 is about 755.6561213081.

The spelling of 431491867 in words is "four hundred thirty-one million, four hundred ninety-one thousand, eight hundred sixty-seven".