22009897 has 8 divisors (see below), whose sum is σ = 27089216. Its totient is φ = 17414352.

The previous prime is 22009859. The next prime is 22009909. The reversal of 22009897 is 79890022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22009897 - 2⁷ = 22009769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22000897) 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 7 ways as a sum of consecutive naturals, for example, 120843 + ... + 121024.

It is an arithmetic number, because the mean of its divisors is an integer number (3386152).

Almost surely, 2^22009897 is an apocalyptic number.

It is an amenable number.

22009897 is a deficient number, since it is larger than the sum of its proper divisors (5079319).

22009897 is a wasteful number, since it uses less digits than its factorization.

22009897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241887.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 22009897 is about 4691.4706649408. The cubic root of 22009897 is about 280.2459446198.

The spelling of 22009897 in words is "twenty-two million, nine thousand, eight hundred ninety-seven".