22406777 has 2 divisors, whose sum is σ = 22406778. Its totient is φ = 22406776.

The previous prime is 22406773. The next prime is 22406779. The reversal of 22406777 is 77760422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22316176 + 90601 = 4724^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 22406777 - 2² = 22406773 is a prime.

Together with 22406779, 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 (22406771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11203388 + 11203389.

It is an arithmetic number, because the mean of its divisors is an integer number (11203389).

Almost surely, 2^22406777 is an apocalyptic number.

It is an amenable number.

22406777 is a deficient number, since it is larger than the sum of its proper divisors (1).

22406777 is an equidigital number, since it uses as much as digits as its factorization.

22406777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 22406777 is about 4733.5797236341. The cubic root of 22406777 is about 281.9203747158.

The spelling of 22406777 in words is "twenty-two million, four hundred six thousand, seven hundred seventy-seven".