12172973 has 2 divisors, whose sum is σ = 12172974. Its totient is φ = 12172972.

The previous prime is 12172961. The next prime is 12172991. The reversal of 12172973 is 37927121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11276164 + 896809 = 3358^2 + 947^2 .

It is a cyclic number.

It is not a de Polignac number, because 12172973 - 2⁸ = 12172717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12172903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086486 + 6086487.

It is an arithmetic number, because the mean of its divisors is an integer number (6086487).

Almost surely, 2^12172973 is an apocalyptic number.

It is an amenable number.

12172973 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172973 is an equidigital number, since it uses as much as digits as its factorization.

12172973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 32.

The square root of 12172973 is about 3488.9787904199. The cubic root of 12172973 is about 230.0376308938.

The spelling of 12172973 in words is "twelve million, one hundred seventy-two thousand, nine hundred seventy-three".