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1993983 = 3664661
BaseRepresentation
bin111100110110011111111
310202022020020
413212303333
51002301413
6110423223
722643235
oct7466377
93668206
101993983
111142122
12801b13
1354a794
1439c955
15295c23
hex1e6cff

1993983 has 4 divisors (see below), whose sum is σ = 2658648. Its totient is φ = 1329320.

The previous prime is 1993973. The next prime is 1993991. The reversal of 1993983 is 3893991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1993983 - 213 = 1985791 is a prime.

It is a D-number.

1993983 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332328 + ... + 332333.

It is an arithmetic number, because the mean of its divisors is an integer number (664662).

21993983 is an apocalyptic number.

1993983 is a deficient number, since it is larger than the sum of its proper divisors (664665).

1993983 is an equidigital number, since it uses as much as digits as its factorization.

1993983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664664.

The product of its digits is 52488, while the sum is 42.

The square root of 1993983 is about 1412.0846291919. The cubic root of 1993983 is about 125.8656289876.

The spelling of 1993983 in words is "one million, nine hundred ninety-three thousand, nine hundred eighty-three".

Divisors: 1 3 664661 1993983