420905063 has 4 divisors (see below), whose sum is σ = 427805208. Its totient is φ = 414004920.

The previous prime is 420905053. The next prime is 420905131. The reversal of 420905063 is 360509024.

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

It is a cyclic number.

It is not a de Polignac number, because 420905063 - 2⁴ = 420905047 is a prime.

It is a super-2 number, since 2×420905063² = 354322144118067938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420905053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3449981 + ... + 3450102.

It is an arithmetic number, because the mean of its divisors is an integer number (106951302).

Almost surely, 2^420905063 is an apocalyptic number.

420905063 is a deficient number, since it is larger than the sum of its proper divisors (6900145).

420905063 is an equidigital number, since it uses as much as digits as its factorization.

420905063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6900144.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 420905063 is about 20515.9709251110. The cubic root of 420905063 is about 749.4247814628.

The spelling of 420905063 in words is "four hundred twenty million, nine hundred five thousand, sixty-three".