420867767 has 4 divisors (see below), whose sum is σ = 422628960. Its totient is φ = 419106576.

The previous prime is 420867763. The next prime is 420867779. The reversal of 420867767 is 767768024.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 420867767 - 2² = 420867763 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 (420867763) 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, 880238 + ... + 880715.

It is an arithmetic number, because the mean of its divisors is an integer number (105657240).

Almost surely, 2^420867767 is an apocalyptic number.

420867767 is a deficient number, since it is larger than the sum of its proper divisors (1761193).

420867767 is a wasteful number, since it uses less digits than its factorization.

420867767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761192.

The product of its (nonzero) digits is 790272, while the sum is 47.

The square root of 420867767 is about 20515.0619545738. The cubic root of 420867767 is about 749.4026455350.

The spelling of 420867767 in words is "four hundred twenty million, eight hundred sixty-seven thousand, seven hundred sixty-seven".