420984899 has 2 divisors, whose sum is σ = 420984900. Its totient is φ = 420984898.

The previous prime is 420984887. The next prime is 420984913. The reversal of 420984899 is 998489024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420984899 - 2⁸ = 420984643 is a prime.

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 420984899.

It is not a weakly prime, because it can be changed into another prime (420984199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210492449 + 210492450.

It is an arithmetic number, because the mean of its divisors is an integer number (210492450).

Almost surely, 2^420984899 is an apocalyptic number.

420984899 is a deficient number, since it is larger than the sum of its proper divisors (1).

420984899 is an equidigital number, since it uses as much as digits as its factorization.

420984899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 420984899 is about 20517.9165365297. The cubic root of 420984899 is about 749.4721613430.

The spelling of 420984899 in words is "four hundred twenty million, nine hundred eighty-four thousand, eight hundred ninety-nine".