1699 has 2 divisors, whose sum is σ = 1700.
Its totient is φ = 1698.
The previous prime is 1697. The next prime is 1709. The reversal of 1699 is 9961.
It can be divided in two parts, 169 and 9, that multiplied together give a square (1521 = 392).
1699 is nontrivially palindromic in base 6.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 1699 - 21 = 1697 is a prime.
Together with 1697, it forms a pair of twin primes.
1699 is a modest number, since divided by 99 gives 16 as remainder.
It is a plaindrome in base 10.
It is a nialpdrome in base 12.
It is not a weakly prime, because it can be changed into another prime (1693) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 849 + 850.
It is an arithmetic number, because the mean of its divisors is an integer number (850).
1699 is a deficient number, since it is larger than the sum of its proper divisors (1).
1699 is an equidigital number, since it uses as much as digits as its factorization.
1699 is an evil number, because the sum of its binary digits is even.
The product of its digits is 486, while the sum is 25.
The square root of 1699 is about 41.2189276910.
The cubic root of 1699 is about 11.9324912971.
The spelling of 1699 in words is "one thousand, six hundred ninety-nine".