163694939 has 2 divisors, whose sum is σ = 163694940. Its totient is φ = 163694938.

The previous prime is 163694893. The next prime is 163694959. The reversal of 163694939 is 939496361.

163694939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163694939 is a prime.

It is not a weakly prime, because it can be changed into another prime (163694959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81847469 + 81847470.

It is an arithmetic number, because the mean of its divisors is an integer number (81847470).

Almost surely, 2^163694939 is an apocalyptic number.

163694939 is a deficient number, since it is larger than the sum of its proper divisors (1).

163694939 is an equidigital number, since it uses as much as digits as its factorization.

163694939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 50.

The square root of 163694939 is about 12794.3322998897. The cubic root of 163694939 is about 547.0307638328.

The spelling of 163694939 in words is "one hundred sixty-three million, six hundred ninety-four thousand, nine hundred thirty-nine".