16397983 has 8 divisors (see below), whose sum is σ = 18951840. Its totient is φ = 13896960.

The previous prime is 16397981. The next prime is 16397987. The reversal of 16397983 is 38979361.

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

It is not a de Polignac number, because 16397983 - 2¹ = 16397981 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 (16397981) 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, 12538 + ... + 13783.

It is an arithmetic number, because the mean of its divisors is an integer number (2368980).

Almost surely, 2^16397983 is an apocalyptic number.

16397983 is a deficient number, since it is larger than the sum of its proper divisors (2553857).

16397983 is an equidigital number, since it uses as much as digits as its factorization.

16397983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26417.

The product of its digits is 244944, while the sum is 46.

The square root of 16397983 is about 4049.4423072813. The cubic root of 16397983 is about 254.0564024207.

The spelling of 16397983 in words is "sixteen million, three hundred ninety-seven thousand, nine hundred eighty-three".