421569983 has 2 divisors, whose sum is σ = 421569984. Its totient is φ = 421569982.

The previous prime is 421569977. The next prime is 421569989. The reversal of 421569983 is 389965124.

It is a balanced prime because it is at equal distance from previous prime (421569977) and next prime (421569989).

It is a cyclic number.

It is not a de Polignac number, because 421569983 - 2⁶ = 421569919 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421569989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210784991 + 210784992.

It is an arithmetic number, because the mean of its divisors is an integer number (210784992).

Almost surely, 2^421569983 is an apocalyptic number.

421569983 is a deficient number, since it is larger than the sum of its proper divisors (1).

421569983 is an equidigital number, since it uses as much as digits as its factorization.

421569983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 47.

The square root of 421569983 is about 20532.1694664738. The cubic root of 421569983 is about 749.8192056065.

The spelling of 421569983 in words is "four hundred twenty-one million, five hundred sixty-nine thousand, nine hundred eighty-three".