22987453 has 4 divisors (see below), whose sum is σ = 23039100. Its totient is φ = 22935808.

The previous prime is 22987439. The next prime is 22987463. The reversal of 22987453 is 35478922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35478922 = 2 ⋅17739461.

It can be written as a sum of positive squares in 2 ways, for example, as 19740249 + 3247204 = 4443^2 + 1802^2 .

It is a cyclic number.

It is not a de Polignac number, because 22987453 - 2²¹ = 20890301 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22987463) 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, 25150 + ... + 26047.

It is an arithmetic number, because the mean of its divisors is an integer number (5759775).

Almost surely, 2^22987453 is an apocalyptic number.

It is an amenable number.

22987453 is a deficient number, since it is larger than the sum of its proper divisors (51647).

22987453 is an equidigital number, since it uses as much as digits as its factorization.

22987453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51646.

The product of its digits is 120960, while the sum is 40.

The square root of 22987453 is about 4794.5232296861. The cubic root of 22987453 is about 284.3349755368.

The spelling of 22987453 in words is "twenty-two million, nine hundred eighty-seven thousand, four hundred fifty-three".