420492623 has 2 divisors, whose sum is σ = 420492624. Its totient is φ = 420492622.

The previous prime is 420492617. The next prime is 420492641. The reversal of 420492623 is 326294024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420492623 - 2⁴ = 420492607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420492623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420492613) 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, 210246311 + 210246312.

It is an arithmetic number, because the mean of its divisors is an integer number (210246312).

Almost surely, 2^420492623 is an apocalyptic number.

420492623 is a deficient number, since it is larger than the sum of its proper divisors (1).

420492623 is an equidigital number, since it uses as much as digits as its factorization.

420492623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 420492623 is about 20505.9167802856. The cubic root of 420492623 is about 749.1799172422.

The spelling of 420492623 in words is "four hundred twenty million, four hundred ninety-two thousand, six hundred twenty-three".