421990269 has 16 divisors (see below), whose sum is σ = 621654912. Its totient is φ = 253265408.

The previous prime is 421990267. The next prime is 421990273. The reversal of 421990269 is 962099124.

It is a cyclic number.

It is not a de Polignac number, because 421990269 - 2¹ = 421990267 is a prime.

It is a super-2 number, since 2×421990269² = 356151574261384722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421990269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421990267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178704 + ... + 181049.

It is an arithmetic number, because the mean of its divisors is an integer number (38853432).

Almost surely, 2^421990269 is an apocalyptic number.

It is an amenable number.

421990269 is a deficient number, since it is larger than the sum of its proper divisors (199664643).

421990269 is a wasteful number, since it uses less digits than its factorization.

421990269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359796.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 421990269 is about 20542.4017339745. The cubic root of 421990269 is about 750.0683013353.

The spelling of 421990269 in words is "four hundred twenty-one million, nine hundred ninety thousand, two hundred sixty-nine".