22179749 has 2 divisors, whose sum is σ = 22179750. Its totient is φ = 22179748.

The previous prime is 22179743. The next prime is 22179757. The reversal of 22179749 is 94797122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19228225 + 2951524 = 4385^2 + 1718^2 .

It is a cyclic number.

It is not a de Polignac number, because 22179749 - 2⁴ = 22179733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22179743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11089874 + 11089875.

It is an arithmetic number, because the mean of its divisors is an integer number (11089875).

Almost surely, 2^22179749 is an apocalyptic number.

It is an amenable number.

22179749 is a deficient number, since it is larger than the sum of its proper divisors (1).

22179749 is an equidigital number, since it uses as much as digits as its factorization.

22179749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 22179749 is about 4709.5380877534. The cubic root of 22179749 is about 280.9649910160.

The spelling of 22179749 in words is "twenty-two million, one hundred seventy-nine thousand, seven hundred forty-nine".