420331099 has 2 divisors, whose sum is σ = 420331100. Its totient is φ = 420331098.

The previous prime is 420331097. The next prime is 420331159. The reversal of 420331099 is 990133024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420331099 - 2¹ = 420331097 is a prime.

Together with 420331097, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420331099.

It is not a weakly prime, because it can be changed into another prime (420331097) 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, 210165549 + 210165550.

It is an arithmetic number, because the mean of its divisors is an integer number (210165550).

Almost surely, 2^420331099 is an apocalyptic number.

420331099 is a deficient number, since it is larger than the sum of its proper divisors (1).

420331099 is an equidigital number, since it uses as much as digits as its factorization.

420331099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 420331099 is about 20501.9779289707. The cubic root of 420331099 is about 749.0839773626.

The spelling of 420331099 in words is "four hundred twenty million, three hundred thirty-one thousand, ninety-nine".