126917173 has 2 divisors, whose sum is σ = 126917174. Its totient is φ = 126917172.

The previous prime is 126917113. The next prime is 126917183. The reversal of 126917173 is 371719621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83594449 + 43322724 = 9143^2 + 6582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126917173 is a prime.

It is a super-2 number, since 2×126917173² = 32215937604623858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126917113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63458586 + 63458587.

It is an arithmetic number, because the mean of its divisors is an integer number (63458587).

Almost surely, 2^126917173 is an apocalyptic number.

It is an amenable number.

126917173 is a deficient number, since it is larger than the sum of its proper divisors (1).

126917173 is an equidigital number, since it uses as much as digits as its factorization.

126917173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 37.

The square root of 126917173 is about 11265.7522163413. The cubic root of 126917173 is about 502.5432722651.

The spelling of 126917173 in words is "one hundred twenty-six million, nine hundred seventeen thousand, one hundred seventy-three".