23166487 has 2 divisors, whose sum is σ = 23166488. Its totient is φ = 23166486.

The previous prime is 23166467. The next prime is 23166503. The reversal of 23166487 is 78466132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23166487 is a prime.

It is a super-2 number, since 2×23166487² = 1073372239842338, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23166457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11583243 + 11583244.

It is an arithmetic number, because the mean of its divisors is an integer number (11583244).

Almost surely, 2^23166487 is an apocalyptic number.

23166487 is a deficient number, since it is larger than the sum of its proper divisors (1).

23166487 is an equidigital number, since it uses as much as digits as its factorization.

23166487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 37.

The square root of 23166487 is about 4813.1576953181. The cubic root of 23166487 is about 285.0712328358.

It can be divided in two parts, 23166 and 487, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 23166487 in words is "twenty-three million, one hundred sixty-six thousand, four hundred eighty-seven".