166136293 has 2 divisors, whose sum is σ = 166136294. Its totient is φ = 166136292.

The previous prime is 166136287. The next prime is 166136317. The reversal of 166136293 is 392631661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107184609 + 58951684 = 10353^2 + 7678^2 .

It is an emirp because it is prime and its reverse (392631661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166136293 - 2⁵ = 166136261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166236293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83068146 + 83068147.

It is an arithmetic number, because the mean of its divisors is an integer number (83068147).

Almost surely, 2^166136293 is an apocalyptic number.

It is an amenable number.

166136293 is a deficient number, since it is larger than the sum of its proper divisors (1).

166136293 is an equidigital number, since it uses as much as digits as its factorization.

166136293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 37.

The square root of 166136293 is about 12889.3868356877. The cubic root of 166136293 is about 549.7368360849.

The spelling of 166136293 in words is "one hundred sixty-six million, one hundred thirty-six thousand, two hundred ninety-three".