22749091 has 4 divisors (see below), whose sum is σ = 22763952. Its totient is φ = 22734232.

The previous prime is 22749073. The next prime is 22749101. The reversal of 22749091 is 19094722.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19094722 = 2 ⋅9547361.

It is a cyclic number.

It is not a de Polignac number, because 22749091 - 2⁵ = 22749059 is a prime.

It is a super-2 number, since 2×22749091² = 1035042282652562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22749011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4831 + ... + 8296.

It is an arithmetic number, because the mean of its divisors is an integer number (5690988).

Almost surely, 2^22749091 is an apocalyptic number.

22749091 is a deficient number, since it is larger than the sum of its proper divisors (14861).

22749091 is a wasteful number, since it uses less digits than its factorization.

22749091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14860.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 22749091 is about 4769.6007170412. The cubic root of 22749091 is about 283.3487814722.

The spelling of 22749091 in words is "twenty-two million, seven hundred forty-nine thousand, ninety-one".