166984793 has 2 divisors, whose sum is σ = 166984794. Its totient is φ = 166984792.

The previous prime is 166984789. The next prime is 166984801. The reversal of 166984793 is 397489661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95023504 + 71961289 = 9748^2 + 8483^2 .

It is an emirp because it is prime and its reverse (397489661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166984793 - 2² = 166984789 is a prime.

It is not a weakly prime, because it can be changed into another prime (166984193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83492396 + 83492397.

It is an arithmetic number, because the mean of its divisors is an integer number (83492397).

Almost surely, 2^166984793 is an apocalyptic number.

It is an amenable number.

166984793 is a deficient number, since it is larger than the sum of its proper divisors (1).

166984793 is an equidigital number, since it uses as much as digits as its factorization.

166984793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 166984793 is about 12922.2595934302. The cubic root of 166984793 is about 550.6711289416.

The spelling of 166984793 in words is "one hundred sixty-six million, nine hundred eighty-four thousand, seven hundred ninety-three".