22987279 has 4 divisors (see below), whose sum is σ = 26271184. Its totient is φ = 19703376.

The previous prime is 22987271. The next prime is 22987291. The reversal of 22987279 is 97278922.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22987279 - 2³ = 22987271 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 (22987271) 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, 1641942 + ... + 1641955.

It is an arithmetic number, because the mean of its divisors is an integer number (6567796).

Almost surely, 2^22987279 is an apocalyptic number.

22987279 is a deficient number, since it is larger than the sum of its proper divisors (3283905).

22987279 is an equidigital number, since it uses as much as digits as its factorization.

22987279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283904.

The product of its digits is 254016, while the sum is 46.

The square root of 22987279 is about 4794.5050839477. The cubic root of 22987279 is about 284.3342581249.

The spelling of 22987279 in words is "twenty-two million, nine hundred eighty-seven thousand, two hundred seventy-nine".