22691749 has 4 divisors (see below), whose sum is σ = 22725280. Its totient is φ = 22658220.

The previous prime is 22691743. The next prime is 22691759. The reversal of 22691749 is 94719622.

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.

It is a cyclic number.

It is not a de Polignac number, because 22691749 - 2⁹ = 22691237 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 (22691743) 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, 15729 + ... + 17110.

It is an arithmetic number, because the mean of its divisors is an integer number (5681320).

Almost surely, 2^22691749 is an apocalyptic number.

It is an amenable number.

22691749 is a deficient number, since it is larger than the sum of its proper divisors (33531).

22691749 is an equidigital number, since it uses as much as digits as its factorization.

22691749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33530.

The product of its digits is 54432, while the sum is 40.

The square root of 22691749 is about 4763.5857292590. The cubic root of 22691749 is about 283.1105088526.

The spelling of 22691749 in words is "twenty-two million, six hundred ninety-one thousand, seven hundred forty-nine".