23149747 has 4 divisors (see below), whose sum is σ = 23362240. Its totient is φ = 22937256.

The previous prime is 23149741. The next prime is 23149757. The reversal of 23149747 is 74794132.

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

It is a cyclic number.

It is not a de Polignac number, because 23149747 - 2³ = 23149739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23149741) 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, 106083 + ... + 106300.

It is an arithmetic number, because the mean of its divisors is an integer number (5840560).

Almost surely, 2^23149747 is an apocalyptic number.

23149747 is a deficient number, since it is larger than the sum of its proper divisors (212493).

23149747 is a wasteful number, since it uses less digits than its factorization.

23149747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212492.

The product of its digits is 42336, while the sum is 37.

The square root of 23149747 is about 4811.4183979363. The cubic root of 23149747 is about 285.0025525574.

The spelling of 23149747 in words is "twenty-three million, one hundred forty-nine thousand, seven hundred forty-seven".