420763913 has 4 divisors (see below), whose sum is σ = 422601540. Its totient is φ = 418926288.

The previous prime is 420763907. The next prime is 420763921. The reversal of 420763913 is 319367024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173896969 + 246866944 = 13187^2 + 15712^2 .

It is a cyclic number.

It is not a de Polignac number, because 420763913 - 2¹⁰ = 420762889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420765913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918470 + ... + 918927.

It is an arithmetic number, because the mean of its divisors is an integer number (105650385).

Almost surely, 2^420763913 is an apocalyptic number.

It is an amenable number.

420763913 is a deficient number, since it is larger than the sum of its proper divisors (1837627).

420763913 is a wasteful number, since it uses less digits than its factorization.

420763913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837626.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 420763913 is about 20512.5306337370. The cubic root of 420763913 is about 749.3409992009.

The spelling of 420763913 in words is "four hundred twenty million, seven hundred sixty-three thousand, nine hundred thirteen".