421785769 has 4 divisors (see below), whose sum is σ = 443985040. Its totient is φ = 399586500.

The previous prime is 421785757. The next prime is 421785803. The reversal of 421785769 is 967587124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421785769 - 2⁷ = 421785641 is a prime.

It is a super-2 number, since 2×421785769² = 355806469861842722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421785719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11099607 + ... + 11099644.

It is an arithmetic number, because the mean of its divisors is an integer number (110996260).

Almost surely, 2^421785769 is an apocalyptic number.

It is an amenable number.

421785769 is a deficient number, since it is larger than the sum of its proper divisors (22199271).

421785769 is a wasteful number, since it uses less digits than its factorization.

421785769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22199270.

The product of its digits is 846720, while the sum is 49.

The square root of 421785769 is about 20537.4236212822. The cubic root of 421785769 is about 749.9471186419.

The spelling of 421785769 in words is "four hundred twenty-one million, seven hundred eighty-five thousand, seven hundred sixty-nine".