23149147 has 16 divisors (see below), whose sum is σ = 27069952. Its totient is φ = 19388160.

The previous prime is 23149111. The next prime is 23149153. The reversal of 23149147 is 74194132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23149147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23149187) 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 15 ways as a sum of consecutive naturals, for example, 69772 + ... + 70102.

It is an arithmetic number, because the mean of its divisors is an integer number (1691872).

Almost surely, 2^23149147 is an apocalyptic number.

23149147 is a deficient number, since it is larger than the sum of its proper divisors (3920805).

23149147 is a wasteful number, since it uses less digits than its factorization.

23149147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its digits is 6048, while the sum is 31.

The square root of 23149147 is about 4811.3560458565. The cubic root of 23149147 is about 285.0000902842. Note that the first 4 decimals are identical.

The spelling of 23149147 in words is "twenty-three million, one hundred forty-nine thousand, one hundred forty-seven".