420663263 has 2 divisors, whose sum is σ = 420663264. Its totient is φ = 420663262.

The previous prime is 420663251. The next prime is 420663289. The reversal of 420663263 is 362366024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420663263 - 2⁴ = 420663247 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420663293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210331631 + 210331632.

It is an arithmetic number, because the mean of its divisors is an integer number (210331632).

Almost surely, 2^420663263 is an apocalyptic number.

420663263 is a deficient number, since it is larger than the sum of its proper divisors (1).

420663263 is an equidigital number, since it uses as much as digits as its factorization.

420663263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 420663263 is about 20510.0771085825. The cubic root of 420663263 is about 749.2812450381.

The spelling of 420663263 in words is "four hundred twenty million, six hundred sixty-three thousand, two hundred sixty-three".