420419999 has 2 divisors, whose sum is σ = 420420000. Its totient is φ = 420419998.

The previous prime is 420419977. The next prime is 420420031. The reversal of 420419999 is 999914024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420419999 - 2⁸ = 420419743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420419939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210209999 + 210210000.

It is an arithmetic number, because the mean of its divisors is an integer number (210210000).

Almost surely, 2^420419999 is an apocalyptic number.

420419999 is a deficient number, since it is larger than the sum of its proper divisors (1).

420419999 is an equidigital number, since it uses as much as digits as its factorization.

420419999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 420419999 is about 20504.1458978422. The cubic root of 420419999 is about 749.1367840440.

The spelling of 420419999 in words is "four hundred twenty million, four hundred nineteen thousand, nine hundred ninety-nine".