163918 has 8 divisors (see below), whose sum is σ = 252000. Its totient is φ = 79920.

The previous prime is 163909. The next prime is 163927. The reversal of 163918 is 819361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (163909) and next prime (163927).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×163918² = 53738221448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

163918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918 + ... + 1081.

It is an arithmetic number, because the mean of its divisors is an integer number (31500).

2¹⁶³⁹¹⁸ is an apocalyptic number.

163918 is a deficient number, since it is larger than the sum of its proper divisors (88082).

163918 is a wasteful number, since it uses less digits than its factorization.

163918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042.

The product of its digits is 1296, while the sum is 28.

The square root of 163918 is about 404.8678796842. The cubic root of 163918 is about 54.7279123876.

It can be divided in two parts, 163 and 918, that added together give a triangular number (1081 = T₄₆).

The spelling of 163918 in words is "one hundred sixty-three thousand, nine hundred eighteen".