23149447 has 4 divisors (see below), whose sum is σ = 23428440. Its totient is φ = 22870456.

The previous prime is 23149409. The next prime is 23149463. The reversal of 23149447 is 74494132.

It is a happy number.

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 23149447 - 2⁷ = 23149319 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 (23149547) 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, 139372 + ... + 139537.

It is an arithmetic number, because the mean of its divisors is an integer number (5857110).

Almost surely, 2^23149447 is an apocalyptic number.

23149447 is a deficient number, since it is larger than the sum of its proper divisors (278993).

23149447 is an equidigital number, since it uses as much as digits as its factorization.

23149447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278992.

The product of its digits is 24192, while the sum is 34.

The square root of 23149447 is about 4811.3872219974. The cubic root of 23149447 is about 285.0013214261.

The spelling of 23149447 in words is "twenty-three million, one hundred forty-nine thousand, four hundred forty-seven".