163689157 has 4 divisors (see below), whose sum is σ = 164978176. Its totient is φ = 162400140.

The previous prime is 163689143. The next prime is 163689167. The reversal of 163689157 is 751986361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751986361 = 7 ⋅107426623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163689157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163689167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644319 + ... + 644572.

It is an arithmetic number, because the mean of its divisors is an integer number (41244544).

Almost surely, 2^163689157 is an apocalyptic number.

It is an amenable number.

163689157 is a deficient number, since it is larger than the sum of its proper divisors (1289019).

163689157 is a wasteful number, since it uses less digits than its factorization.

163689157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289018.

The product of its digits is 272160, while the sum is 46.

The square root of 163689157 is about 12794.1063384669. The cubic root of 163689157 is about 547.0243230531.

The spelling of 163689157 in words is "one hundred sixty-three million, six hundred eighty-nine thousand, one hundred fifty-seven".