18675169 has 2 divisors, whose sum is σ = 18675170. Its totient is φ = 18675168.

The previous prime is 18675143. The next prime is 18675187. The reversal of 18675169 is 96157681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 12769 = 4320^2 + 113^2 .

It is an emirp because it is prime and its reverse (96157681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18675169 - 2⁹ = 18674657 is a prime.

It is a super-2 number, since 2×18675169² = 697523874357122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18675199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9337584 + 9337585.

It is an arithmetic number, because the mean of its divisors is an integer number (9337585).

Almost surely, 2^18675169 is an apocalyptic number.

It is an amenable number.

18675169 is a deficient number, since it is larger than the sum of its proper divisors (1).

18675169 is an equidigital number, since it uses as much as digits as its factorization.

18675169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The square root of 18675169 is about 4321.4776408076. The cubic root of 18675169 is about 265.3107497354.

The spelling of 18675169 in words is "eighteen million, six hundred seventy-five thousand, one hundred sixty-nine".