23871971 has 2 divisors, whose sum is σ = 23871972. Its totient is φ = 23871970.

The previous prime is 23871937. The next prime is 23871973. The reversal of 23871971 is 17917832.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23871971 is a prime.

Together with 23871973, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1499555 and since 23871971 and 1499555 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23871973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11935985 + 11935986.

It is an arithmetic number, because the mean of its divisors is an integer number (11935986).

Almost surely, 2^23871971 is an apocalyptic number.

23871971 is a deficient number, since it is larger than the sum of its proper divisors (1).

23871971 is an equidigital number, since it uses as much as digits as its factorization.

23871971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 38.

The square root of 23871971 is about 4885.8951073473. The cubic root of 23871971 is about 287.9360832631.

It can be divided in two parts, 23871 and 971, that added together give a palindrome (24842).

The spelling of 23871971 in words is "twenty-three million, eight hundred seventy-one thousand, nine hundred seventy-one".