12117949 has 2 divisors, whose sum is σ = 12117950. Its totient is φ = 12117948.

The previous prime is 12117947. The next prime is 12117967. The reversal of 12117949 is 94971121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10208025 + 1909924 = 3195^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 12117949 - 2¹ = 12117947 is a prime.

Together with 12117947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12117943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6058974 + 6058975.

It is an arithmetic number, because the mean of its divisors is an integer number (6058975).

Almost surely, 2^12117949 is an apocalyptic number.

It is an amenable number.

12117949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12117949 is an equidigital number, since it uses as much as digits as its factorization.

12117949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 34.

The square root of 12117949 is about 3481.0844574644. The cubic root of 12117949 is about 229.6905036922.

The spelling of 12117949 in words is "twelve million, one hundred seventeen thousand, nine hundred forty-nine".