22009129 has 4 divisors (see below), whose sum is σ = 22019920. Its totient is φ = 21998340.

The previous prime is 22009109. The next prime is 22009147. The reversal of 22009129 is 92190022.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22009129 - 2²¹ = 19911977 is a prime.

It is a super-3 number, since 3×22009129³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22009109) 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, 1299 + ... + 6760.

It is an arithmetic number, because the mean of its divisors is an integer number (5504980).

Almost surely, 2^22009129 is an apocalyptic number.

It is an amenable number.

22009129 is a deficient number, since it is larger than the sum of its proper divisors (10791).

22009129 is an equidigital number, since it uses as much as digits as its factorization.

22009129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10790.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 22009129 is about 4691.3888135604. The cubic root of 22009129 is about 280.2426850045.

The spelling of 22009129 in words is "twenty-two million, nine thousand, one hundred twenty-nine".