12117929 has 2 divisors, whose sum is σ = 12117930. Its totient is φ = 12117928.

The previous prime is 12117887. The next prime is 12117943. The reversal of 12117929 is 92971121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8323225 + 3794704 = 2885^2 + 1948^2 .

It is a cyclic number.

It is not a de Polignac number, because 12117929 - 2¹² = 12113833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12117895 and 12117904.

It is not a weakly prime, because it can be changed into another prime (12117949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6058964 + 6058965.

It is an arithmetic number, because the mean of its divisors is an integer number (6058965).

Almost surely, 2^12117929 is an apocalyptic number.

It is an amenable number.

12117929 is a deficient number, since it is larger than the sum of its proper divisors (1).

12117929 is an equidigital number, since it uses as much as digits as its factorization.

12117929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 32.

The square root of 12117929 is about 3481.0815847952. The cubic root of 12117929 is about 229.6903773283.

The spelling of 12117929 in words is "twelve million, one hundred seventeen thousand, nine hundred twenty-nine".