12318499 has 2 divisors, whose sum is σ = 12318500. Its totient is φ = 12318498.

The previous prime is 12318487. The next prime is 12318503. The reversal of 12318499 is 99481321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12318499 - 2¹⁵ = 12285731 is a prime.

It is a super-2 number, since 2×12318499² = 303490835226002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12318799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6159249 + 6159250.

It is an arithmetic number, because the mean of its divisors is an integer number (6159250).

Almost surely, 2^12318499 is an apocalyptic number.

12318499 is a deficient number, since it is larger than the sum of its proper divisors (1).

12318499 is an equidigital number, since it uses as much as digits as its factorization.

12318499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 12318499 is about 3509.7719299123. The cubic root of 12318499 is about 230.9506900490.

It can be divided in two parts, 1231 and 8499, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 12318499 in words is "twelve million, three hundred eighteen thousand, four hundred ninety-nine".