421790953 has 2 divisors, whose sum is σ = 421790954. Its totient is φ = 421790952.

The previous prime is 421790921. The next prime is 421790969. The reversal of 421790953 is 359097124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419963049 + 1827904 = 20493^2 + 1352^2 .

It is a cyclic number.

It is not a de Polignac number, because 421790953 - 2⁵ = 421790921 is a prime.

It is not a weakly prime, because it can be changed into another prime (421190953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210895476 + 210895477.

It is an arithmetic number, because the mean of its divisors is an integer number (210895477).

Almost surely, 2^421790953 is an apocalyptic number.

It is an amenable number.

421790953 is a deficient number, since it is larger than the sum of its proper divisors (1).

421790953 is an equidigital number, since it uses as much as digits as its factorization.

421790953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 421790953 is about 20537.5498295196. The cubic root of 421790953 is about 749.9501910625.

The spelling of 421790953 in words is "four hundred twenty-one million, seven hundred ninety thousand, nine hundred fifty-three".