23189477 has 4 divisors (see below), whose sum is σ = 23755116. Its totient is φ = 22623840.

The previous prime is 23189459. The next prime is 23189527. The reversal of 23189477 is 77498132.

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 474721 + 22714756 = 689^2 + 4766^2 .

It is a cyclic number.

It is not a de Polignac number, because 23189477 - 2¹⁴ = 23173093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 565597 = 23189477 / (2 + 3 + 1 + 8 + 9 + 4 + 7 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23189447) 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, 282758 + ... + 282839.

It is an arithmetic number, because the mean of its divisors is an integer number (5938779).

Almost surely, 2^23189477 is an apocalyptic number.

It is an amenable number.

23189477 is a deficient number, since it is larger than the sum of its proper divisors (565639).

23189477 is an equidigital number, since it uses as much as digits as its factorization.

23189477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565638.

The product of its digits is 84672, while the sum is 41.

The square root of 23189477 is about 4815.5453481407. The cubic root of 23189477 is about 285.1655014933.

The spelling of 23189477 in words is "twenty-three million, one hundred eighty-nine thousand, four hundred seventy-seven".