420495923 has 4 divisors (see below), whose sum is σ = 420577608. Its totient is φ = 420414240.

The previous prime is 420495917. The next prime is 420495961. The reversal of 420495923 is 329594024.

It is a happy number.

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 420495923 - 2¹⁴ = 420479539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420494923) 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, 32561 + ... + 43602.

It is an arithmetic number, because the mean of its divisors is an integer number (105144402).

Almost surely, 2^420495923 is an apocalyptic number.

420495923 is a deficient number, since it is larger than the sum of its proper divisors (81685).

420495923 is an equidigital number, since it uses as much as digits as its factorization.

420495923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81684.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 420495923 is about 20505.9972447087. The cubic root of 420495923 is about 749.1818770762.

The spelling of 420495923 in words is "four hundred twenty million, four hundred ninety-five thousand, nine hundred twenty-three".