420979253 has 2 divisors, whose sum is σ = 420979254. Its totient is φ = 420979252.

The previous prime is 420979213. The next prime is 420979261. The reversal of 420979253 is 352979024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 333500644 + 87478609 = 18262^2 + 9353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420979253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420979253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420979213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210489626 + 210489627.

It is an arithmetic number, because the mean of its divisors is an integer number (210489627).

Almost surely, 2^420979253 is an apocalyptic number.

It is an amenable number.

420979253 is a deficient number, since it is larger than the sum of its proper divisors (1).

420979253 is an equidigital number, since it uses as much as digits as its factorization.

420979253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 420979253 is about 20517.7789489993. The cubic root of 420979253 is about 749.4688108359.

The spelling of 420979253 in words is "four hundred twenty million, nine hundred seventy-nine thousand, two hundred fifty-three".