1899 has 6 divisors (see below), whose sum is σ = 2756. Its totient is φ = 1260.

The previous prime is 1889. The next prime is 1901. The reversal of 1899 is 9981.

1899 is nontrivially palindromic in base 8 and base 14.

It is not a de Polignac number, because 1899 - 2⁵ = 1867 is a prime.

It is a Duffinian number.

1899 is a modest number, since divided by 99 gives 18 as remainder.

1899 is a lucky number.

1899 is a nontrivial repdigit in base 14.

It is a plaindrome in base 10, base 11, base 12 and base 14.

It is a nialpdrome in base 13 and base 14.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 97 + ... + 114.

2¹⁸⁹⁹ is an apocalyptic number.

1899 is a deficient number, since it is larger than the sum of its proper divisors (857).

1899 is a wasteful number, since it uses less digits than its factorization.

1899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 214 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 1899 is about 43.5775171390. The cubic root of 1899 is about 12.3834499986.

It can be divided in two parts, 1 and 899, that added together give a square (900 = 30²).

The spelling of 1899 in words is "one thousand, eight hundred ninety-nine".