431949893 has 2 divisors, whose sum is σ = 431949894. Its totient is φ = 431949892.

The previous prime is 431949853. The next prime is 431949907. The reversal of 431949893 is 398949134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431060644 + 889249 = 20762^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 431949893 - 2⁶ = 431949829 is a prime.

It is a super-2 number, since 2×431949893² = 373161420125422898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431949823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215974946 + 215974947.

It is an arithmetic number, because the mean of its divisors is an integer number (215974947).

Almost surely, 2^431949893 is an apocalyptic number.

It is an amenable number.

431949893 is a deficient number, since it is larger than the sum of its proper divisors (1).

431949893 is an equidigital number, since it uses as much as digits as its factorization.

431949893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 50.

The square root of 431949893 is about 20783.4042687910. The cubic root of 431949893 is about 755.9234015550.

The spelling of 431949893 in words is "four hundred thirty-one million, nine hundred forty-nine thousand, eight hundred ninety-three".