123182009 has 2 divisors, whose sum is σ = 123182010. Its totient is φ = 123182008.

The previous prime is 123181967. The next prime is 123182023. The reversal of 123182009 is 900281321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112423609 + 10758400 = 10603^2 + 3280^2 .

It is a cyclic number.

It is not a de Polignac number, because 123182009 - 2¹² = 123177913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123182069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61591004 + 61591005.

It is an arithmetic number, because the mean of its divisors is an integer number (61591005).

Almost surely, 2^123182009 is an apocalyptic number.

It is an amenable number.

123182009 is a deficient number, since it is larger than the sum of its proper divisors (1).

123182009 is an equidigital number, since it uses as much as digits as its factorization.

123182009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 123182009 is about 11098.7390725253. The cubic root of 123182009 is about 497.5641646826.

The spelling of 123182009 in words is "one hundred twenty-three million, one hundred eighty-two thousand, nine".