23138653 has 4 divisors (see below), whose sum is σ = 23764060. Its totient is φ = 22513248.

The previous prime is 23138623. The next prime is 23138659. The reversal of 23138653 is 35683132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13235044 + 9903609 = 3638^2 + 3147^2 .

It is a cyclic number.

It is not a de Polignac number, because 23138653 - 2¹³ = 23130461 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 (23138659) 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, 312648 + ... + 312721.

It is an arithmetic number, because the mean of its divisors is an integer number (5941015).

Almost surely, 2^23138653 is an apocalyptic number.

It is an amenable number.

23138653 is a deficient number, since it is larger than the sum of its proper divisors (625407).

23138653 is an equidigital number, since it uses as much as digits as its factorization.

23138653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625406.

The product of its digits is 12960, while the sum is 31.

The square root of 23138653 is about 4810.2653772947. The cubic root of 23138653 is about 284.9570182437.

The spelling of 23138653 in words is "twenty-three million, one hundred thirty-eight thousand, six hundred fifty-three".