22487689 has 4 divisors (see below), whose sum is σ = 25700224. Its totient is φ = 19275156.

The previous prime is 22487687. The next prime is 22487737. The reversal of 22487689 is 98678422.

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 an emirpimes, since its reverse is a distinct semiprime: 98678422 = 2 ⋅49339211.

It is a cyclic number.

It is not a de Polignac number, because 22487689 - 2¹ = 22487687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22487683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1606257 + ... + 1606270.

It is an arithmetic number, because the mean of its divisors is an integer number (6425056).

Almost surely, 2^22487689 is an apocalyptic number.

It is an amenable number.

22487689 is a deficient number, since it is larger than the sum of its proper divisors (3212535).

22487689 is an equidigital number, since it uses as much as digits as its factorization.

22487689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212534.

The product of its digits is 387072, while the sum is 46.

The square root of 22487689 is about 4742.1186193515. The cubic root of 22487689 is about 282.2593099614.

The spelling of 22487689 in words is "twenty-two million, four hundred eighty-seven thousand, six hundred eighty-nine".