420783793 has 2 divisors, whose sum is σ = 420783794. Its totient is φ = 420783792.

The previous prime is 420783773. The next prime is 420783817. The reversal of 420783793 is 397387024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416486464 + 4297329 = 20408^2 + 2073^2 .

It is a cyclic number.

It is not a de Polignac number, because 420783793 - 2¹³ = 420775601 is a prime.

It is not a weakly prime, because it can be changed into another prime (420783703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210391896 + 210391897.

It is an arithmetic number, because the mean of its divisors is an integer number (210391897).

Almost surely, 2^420783793 is an apocalyptic number.

It is an amenable number.

420783793 is a deficient number, since it is larger than the sum of its proper divisors (1).

420783793 is an equidigital number, since it uses as much as digits as its factorization.

420783793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 420783793 is about 20513.0152098613. The cubic root of 420783793 is about 749.3528004858.

The spelling of 420783793 in words is "four hundred twenty million, seven hundred eighty-three thousand, seven hundred ninety-three".