183997 has 8 divisors (see below), whose sum is σ = 205920. Its totient is φ = 162960.

The previous prime is 183979. The next prime is 184003. The reversal of 183997 is 799381.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-183997 is a prime.

It is a d-powerful number, because it can be written as 1 + 8 + 9³ + 3¹⁰ + 9⁴ + 7⁶ .

183997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (183907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279 + ... + 667.

It is an arithmetic number, because the mean of its divisors is an integer number (25740).

2¹⁸³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

183997 is a deficient number, since it is larger than the sum of its proper divisors (21923).

183997 is a wasteful number, since it uses less digits than its factorization.

183997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443.

The product of its digits is 13608, while the sum is 37.

The square root of 183997 is about 428.9487148833. The cubic root of 183997 is about 56.8770304794.

It can be divided in two parts, 1839 and 97, that added together give a square (1936 = 44²).

The spelling of 183997 in words is "one hundred eighty-three thousand, nine hundred ninety-seven".