421980353 has 2 divisors, whose sum is σ = 421980354. Its totient is φ = 421980352.

The previous prime is 421980343. The next prime is 421980397. The reversal of 421980353 is 353089124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406707889 + 15272464 = 20167^2 + 3908^2 .

It is a cyclic number.

It is not a de Polignac number, because 421980353 - 2⁴ = 421980337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (421980313) 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, 210990176 + 210990177.

It is an arithmetic number, because the mean of its divisors is an integer number (210990177).

Almost surely, 2^421980353 is an apocalyptic number.

It is an amenable number.

421980353 is a deficient number, since it is larger than the sum of its proper divisors (1).

421980353 is an equidigital number, since it uses as much as digits as its factorization.

421980353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 421980353 is about 20542.1603781102. The cubic root of 421980353 is about 750.0624262112.

The spelling of 421980353 in words is "four hundred twenty-one million, nine hundred eighty thousand, three hundred fifty-three".