163939797 has 48 divisors (see below), whose sum is σ = 276814720. Its totient is φ = 91570176.

The previous prime is 163939793. The next prime is 163939799. The reversal of 163939797 is 797939361.

163939797 is a `hidden beast` number, since 163 + 9 + 397 + 97 = 666.

163939797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163939797 - 2² = 163939793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163939793) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 849333 + ... + 849525.

Almost surely, 2^163939797 is an apocalyptic number.

It is an amenable number.

163939797 is a deficient number, since it is larger than the sum of its proper divisors (112874923).

163939797 is a wasteful number, since it uses less digits than its factorization.

163939797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 439 counting only the distinct ones).

The product of its digits is 1928934, while the sum is 54.

The square root of 163939797 is about 12803.8977268643. The cubic root of 163939797 is about 547.3033809527.

The spelling of 163939797 in words is "one hundred sixty-three million, nine hundred thirty-nine thousand, seven hundred ninety-seven".