22595989 has 4 divisors (see below), whose sum is σ = 24334156. Its totient is φ = 20857824.

The previous prime is 22595987. The next prime is 22596001. The reversal of 22595989 is 98959522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98959522 = 2 ⋅49479761.

It can be written as a sum of positive squares in 2 ways, for example, as 2748964 + 19847025 = 1658^2 + 4455^2 .

It is not a de Polignac number, because 22595989 - 2¹ = 22595987 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 (22595981) 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, 869064 + ... + 869089.

It is an arithmetic number, because the mean of its divisors is an integer number (6083539).

Almost surely, 2^22595989 is an apocalyptic number.

It is an amenable number.

22595989 is a deficient number, since it is larger than the sum of its proper divisors (1738167).

22595989 is a wasteful number, since it uses less digits than its factorization.

22595989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738166.

The product of its digits is 583200, while the sum is 49.

The square root of 22595989 is about 4753.5238507869. The cubic root of 22595989 is about 282.7117018093.

The spelling of 22595989 in words is "twenty-two million, five hundred ninety-five thousand, nine hundred eighty-nine".