421966789 has 8 divisors (see below), whose sum is σ = 426794112. Its totient is φ = 417152400.

The previous prime is 421966693. The next prime is 421966813. The reversal of 421966789 is 987669124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421966789 - 2⁷ = 421966661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421960789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72232 + ... + 77854.

It is an arithmetic number, because the mean of its divisors is an integer number (53349264).

Almost surely, 2^421966789 is an apocalyptic number.

It is an amenable number.

421966789 is a deficient number, since it is larger than the sum of its proper divisors (4827323).

421966789 is a wasteful number, since it uses less digits than its factorization.

421966789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6467.

The product of its digits is 1306368, while the sum is 52.

The square root of 421966789 is about 20541.8302251771. The cubic root of 421966789 is about 750.0543895371.

The spelling of 421966789 in words is "four hundred twenty-one million, nine hundred sixty-six thousand, seven hundred eighty-nine".