166913839 has 2 divisors, whose sum is σ = 166913840. Its totient is φ = 166913838.

The previous prime is 166913833. The next prime is 166913849. The reversal of 166913839 is 938319661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166913839 - 2¹³ = 166905647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166913833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83456919 + 83456920.

It is an arithmetic number, because the mean of its divisors is an integer number (83456920).

Almost surely, 2^166913839 is an apocalyptic number.

166913839 is a deficient number, since it is larger than the sum of its proper divisors (1).

166913839 is an equidigital number, since it uses as much as digits as its factorization.

166913839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 46.

The square root of 166913839 is about 12919.5138840438. The cubic root of 166913839 is about 550.5931221283.

The spelling of 166913839 in words is "one hundred sixty-six million, nine hundred thirteen thousand, eight hundred thirty-nine".