420944807 has 2 divisors, whose sum is σ = 420944808. Its totient is φ = 420944806.

The previous prime is 420944779. The next prime is 420944861. The reversal of 420944807 is 708449024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420944807 - 2⁶ = 420944743 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 (420944507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210472403 + 210472404.

It is an arithmetic number, because the mean of its divisors is an integer number (210472404).

Almost surely, 2^420944807 is an apocalyptic number.

420944807 is a deficient number, since it is larger than the sum of its proper divisors (1).

420944807 is an equidigital number, since it uses as much as digits as its factorization.

420944807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 420944807 is about 20516.9395134849. The cubic root of 420944807 is about 749.4483688888.

The spelling of 420944807 in words is "four hundred twenty million, nine hundred forty-four thousand, eight hundred seven".