420843967 has 8 divisors (see below), whose sum is σ = 441136080. Its totient is φ = 401029440.

The previous prime is 420843961. The next prime is 420843971. The reversal of 420843967 is 769348024.

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 420843967 - 2²³ = 412455359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420843961) 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, 117592 + ... + 121117.

It is an arithmetic number, because the mean of its divisors is an integer number (55142010).

Almost surely, 2^420843967 is an apocalyptic number.

420843967 is a deficient number, since it is larger than the sum of its proper divisors (20292113).

420843967 is a wasteful number, since it uses less digits than its factorization.

420843967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238793.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 420843967 is about 20514.4818847564. The cubic root of 420843967 is about 749.3885190717.

The spelling of 420843967 in words is "four hundred twenty million, eight hundred forty-three thousand, nine hundred sixty-seven".