421312999 has 2 divisors, whose sum is σ = 421313000. Its totient is φ = 421312998.

The previous prime is 421312993. The next prime is 421313051. The reversal of 421312999 is 999213124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421312999 - 2⁵ = 421312967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421312993) 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, 210656499 + 210656500.

It is an arithmetic number, because the mean of its divisors is an integer number (210656500).

Almost surely, 2^421312999 is an apocalyptic number.

421312999 is a deficient number, since it is larger than the sum of its proper divisors (1).

421312999 is an equidigital number, since it uses as much as digits as its factorization.

421312999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 40.

The square root of 421312999 is about 20525.9104304779. The cubic root of 421312999 is about 749.6668143754. Note that the first 3 decimals are identical.

The spelling of 421312999 in words is "four hundred twenty-one million, three hundred twelve thousand, nine hundred ninety-nine".