431023993 has 2 divisors, whose sum is σ = 431023994. Its totient is φ = 431023992.

The previous prime is 431023973. The next prime is 431024003. The reversal of 431023993 is 399320134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266081344 + 164942649 = 16312^2 + 12843^2 .

It is a cyclic number.

It is not a de Polignac number, because 431023993 - 2¹³ = 431015801 is a prime.

It is not a weakly prime, because it can be changed into another prime (431023973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215511996 + 215511997.

It is an arithmetic number, because the mean of its divisors is an integer number (215511997).

Almost surely, 2^431023993 is an apocalyptic number.

It is an amenable number.

431023993 is a deficient number, since it is larger than the sum of its proper divisors (1).

431023993 is an equidigital number, since it uses as much as digits as its factorization.

431023993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 431023993 is about 20761.1173350569. The cubic root of 431023993 is about 755.3828989188.

The spelling of 431023993 in words is "four hundred thirty-one million, twenty-three thousand, nine hundred ninety-three".