22777649 has 2 divisors, whose sum is σ = 22777650. Its totient is φ = 22777648.

The previous prime is 22777609. The next prime is 22777663. The reversal of 22777649 is 94677722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15460624 + 7317025 = 3932^2 + 2705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22777649 is a prime.

It is not a weakly prime, because it can be changed into another prime (22777609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11388824 + 11388825.

It is an arithmetic number, because the mean of its divisors is an integer number (11388825).

Almost surely, 2^22777649 is an apocalyptic number.

It is an amenable number.

22777649 is a deficient number, since it is larger than the sum of its proper divisors (1).

22777649 is an equidigital number, since it uses as much as digits as its factorization.

22777649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 44.

The square root of 22777649 is about 4772.5935297278. The cubic root of 22777649 is about 283.4672988938.

The spelling of 22777649 in words is "twenty-two million, seven hundred seventy-seven thousand, six hundred forty-nine".