23147987 has 2 divisors, whose sum is σ = 23147988. Its totient is φ = 23147986.

The previous prime is 23147963. The next prime is 23148029. The reversal of 23147987 is 78974132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23147987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23147587) 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 as a sum of consecutive naturals, namely, 11573993 + 11573994.

It is an arithmetic number, because the mean of its divisors is an integer number (11573994).

Almost surely, 2^23147987 is an apocalyptic number.

23147987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23147987 is an equidigital number, since it uses as much as digits as its factorization.

23147987 is an odious number, because the sum of its binary digits is odd.

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

The square root of 23147987 is about 4811.2354962109. The cubic root of 23147987 is about 284.9953297686.

It can be divided in two parts, 2314 and 7987, that added together give a palindrome (10301).

The spelling of 23147987 in words is "twenty-three million, one hundred forty-seven thousand, nine hundred eighty-seven".