22077749 has 4 divisors (see below), whose sum is σ = 22128480. Its totient is φ = 22027020.

The previous prime is 22077743. The next prime is 22077761. The reversal of 22077749 is 94777022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94777022 = 2 ⋅47388511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22077749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22077743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24707 + ... + 25584.

It is an arithmetic number, because the mean of its divisors is an integer number (5532120).

Almost surely, 2^22077749 is an apocalyptic number.

It is an amenable number.

22077749 is a deficient number, since it is larger than the sum of its proper divisors (50731).

22077749 is an equidigital number, since it uses as much as digits as its factorization.

22077749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50730.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 22077749 is about 4698.6965213770. The cubic root of 22077749 is about 280.5336294613.

The spelling of 22077749 in words is "twenty-two million, seventy-seven thousand, seven hundred forty-nine".