420328253 has 2 divisors, whose sum is σ = 420328254. Its totient is φ = 420328252.

The previous prime is 420328231. The next prime is 420328261. The reversal of 420328253 is 352823024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303212569 + 117115684 = 17413^2 + 10822^2 .

It is a cyclic number.

It is not a de Polignac number, because 420328253 - 2⁸ = 420327997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420028253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210164126 + 210164127.

It is an arithmetic number, because the mean of its divisors is an integer number (210164127).

Almost surely, 2^420328253 is an apocalyptic number.

It is an amenable number.

420328253 is a deficient number, since it is larger than the sum of its proper divisors (1).

420328253 is an equidigital number, since it uses as much as digits as its factorization.

420328253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 420328253 is about 20501.9085209158. The cubic root of 420328253 is about 749.0822867130.

The spelling of 420328253 in words is "four hundred twenty million, three hundred twenty-eight thousand, two hundred fifty-three".