22778867 has 2 divisors, whose sum is σ = 22778868. Its totient is φ = 22778866.

The previous prime is 22778857. The next prime is 22778869. The reversal of 22778867 is 76887722.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22778867 - 2⁸ = 22778611 is a prime.

Together with 22778869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22778869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11389433 + 11389434.

It is an arithmetic number, because the mean of its divisors is an integer number (11389434).

Almost surely, 2^22778867 is an apocalyptic number.

22778867 is a deficient number, since it is larger than the sum of its proper divisors (1).

22778867 is an equidigital number, since it uses as much as digits as its factorization.

22778867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 526848, while the sum is 47.

The square root of 22778867 is about 4772.7211315978. The cubic root of 22778867 is about 283.4723514640.

The spelling of 22778867 in words is "twenty-two million, seven hundred seventy-eight thousand, eight hundred sixty-seven".