431166493 has 2 divisors, whose sum is σ = 431166494. Its totient is φ = 431166492.

The previous prime is 431166479. The next prime is 431166509. The reversal of 431166493 is 394661134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421193529 + 9972964 = 20523^2 + 3158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431166493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431166443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215583246 + 215583247.

It is an arithmetic number, because the mean of its divisors is an integer number (215583247).

Almost surely, 2^431166493 is an apocalyptic number.

It is an amenable number.

431166493 is a deficient number, since it is larger than the sum of its proper divisors (1).

431166493 is an equidigital number, since it uses as much as digits as its factorization.

431166493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 37.

The square root of 431166493 is about 20764.5489476656. The cubic root of 431166493 is about 755.4661349680.

The spelling of 431166493 in words is "four hundred thirty-one million, one hundred sixty-six thousand, four hundred ninety-three".