420990803 has 2 divisors, whose sum is σ = 420990804. Its totient is φ = 420990802.

The previous prime is 420990799. The next prime is 420990821. The reversal of 420990803 is 308099024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420990803 - 2² = 420990799 is a prime.

It is not a weakly prime, because it can be changed into another prime (420990853) 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, 210495401 + 210495402.

It is an arithmetic number, because the mean of its divisors is an integer number (210495402).

Almost surely, 2^420990803 is an apocalyptic number.

420990803 is a deficient number, since it is larger than the sum of its proper divisors (1).

420990803 is an equidigital number, since it uses as much as digits as its factorization.

420990803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 420990803 is about 20518.0604102824. The cubic root of 420990803 is about 749.4756649231.

The spelling of 420990803 in words is "four hundred twenty million, nine hundred ninety thousand, eight hundred three".