422778067 has 4 divisors (see below), whose sum is σ = 422864440. Its totient is φ = 422691696.

The previous prime is 422778017. The next prime is 422778073. The reversal of 422778067 is 760877224.

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

It is a cyclic number.

It is not a de Polignac number, because 422778067 - 2⁷ = 422777939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422778017) 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, 35373 + ... + 45790.

It is an arithmetic number, because the mean of its divisors is an integer number (105716110).

Almost surely, 2^422778067 is an apocalyptic number.

422778067 is a deficient number, since it is larger than the sum of its proper divisors (86373).

422778067 is an equidigital number, since it uses as much as digits as its factorization.

422778067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86372.

The product of its (nonzero) digits is 263424, while the sum is 43.

The square root of 422778067 is about 20561.5677174675. The cubic root of 422778067 is about 750.5347694197.

The spelling of 422778067 in words is "four hundred twenty-two million, seven hundred seventy-eight thousand, sixty-seven".