22098749 has 4 divisors (see below), whose sum is σ = 22378560. Its totient is φ = 21818940.

The previous prime is 22098743. The next prime is 22098757. The reversal of 22098749 is 94789022.

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 22098749 - 2⁴ = 22098733 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 (22098743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139787 + ... + 139944.

It is an arithmetic number, because the mean of its divisors is an integer number (5594640).

Almost surely, 2^22098749 is an apocalyptic number.

It is an amenable number.

22098749 is a deficient number, since it is larger than the sum of its proper divisors (279811).

22098749 is an equidigital number, since it uses as much as digits as its factorization.

22098749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279810.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 22098749 is about 4700.9306525410. The cubic root of 22098749 is about 280.6225476346.

The spelling of 22098749 in words is "twenty-two million, ninety-eight thousand, seven hundred forty-nine".