434431993 has 2 divisors, whose sum is σ = 434431994. Its totient is φ = 434431992.

The previous prime is 434431961. The next prime is 434432021. The reversal of 434431993 is 399134434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343286784 + 91145209 = 18528^2 + 9547^2 .

It is a cyclic number.

It is not a de Polignac number, because 434431993 - 2⁵ = 434431961 is a prime.

It is not a weakly prime, because it can be changed into another prime (434431493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217215996 + 217215997.

It is an arithmetic number, because the mean of its divisors is an integer number (217215997).

Almost surely, 2^434431993 is an apocalyptic number.

It is an amenable number.

434431993 is a deficient number, since it is larger than the sum of its proper divisors (1).

434431993 is an equidigital number, since it uses as much as digits as its factorization.

434431993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 40.

The square root of 434431993 is about 20843.0322410152. The cubic root of 434431993 is about 757.3685499159.

The spelling of 434431993 in words is "four hundred thirty-four million, four hundred thirty-one thousand, nine hundred ninety-three".