420502099 has 2 divisors, whose sum is σ = 420502100. Its totient is φ = 420502098.

The previous prime is 420502063. The next prime is 420502163. The reversal of 420502099 is 990205024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420502099 - 2¹¹ = 420500051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420502099.

It is not a weakly prime, because it can be changed into another prime (420502039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210251049 + 210251050.

It is an arithmetic number, because the mean of its divisors is an integer number (210251050).

Almost surely, 2^420502099 is an apocalyptic number.

420502099 is a deficient number, since it is larger than the sum of its proper divisors (1).

420502099 is an equidigital number, since it uses as much as digits as its factorization.

420502099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 420502099 is about 20506.1478342472. The cubic root of 420502099 is about 749.1855449077.

The spelling of 420502099 in words is "four hundred twenty million, five hundred two thousand, ninety-nine".