166954213 has 2 divisors, whose sum is σ = 166954214. Its totient is φ = 166954212.

The previous prime is 166954163. The next prime is 166954237. The reversal of 166954213 is 312459661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105206049 + 61748164 = 10257^2 + 7858^2 .

It is an emirp because it is prime and its reverse (312459661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166954213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166954243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83477106 + 83477107.

It is an arithmetic number, because the mean of its divisors is an integer number (83477107).

Almost surely, 2^166954213 is an apocalyptic number.

It is an amenable number.

166954213 is a deficient number, since it is larger than the sum of its proper divisors (1).

166954213 is an equidigital number, since it uses as much as digits as its factorization.

166954213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 166954213 is about 12921.0763096578. The cubic root of 166954213 is about 550.6375120059.

The spelling of 166954213 in words is "one hundred sixty-six million, nine hundred fifty-four thousand, two hundred thirteen".