1900089 has 12 divisors (see below), whose sum is σ = 2790372. Its totient is φ = 1245600.

The previous prime is 1900079. The next prime is 1900111. The reversal of 1900089 is 9800091.

It can be written as a sum of positive squares in 2 ways, for example, as 189225 + 1710864 = 435^2 + 1308^2 .

It is not a de Polignac number, because 1900089 - 2¹⁵ = 1867321 is a prime.

It is a super-2 number, since 2×1900089² = 7220676415842, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

1900089 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1900009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1182 + ... + 2279.

It is an arithmetic number, because the mean of its divisors is an integer number (232531).

2^1900089 is an apocalyptic number.

It is an amenable number.

1900089 is a deficient number, since it is larger than the sum of its proper divisors (890283).

1900089 is a wasteful number, since it uses less digits than its factorization.

1900089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3528 (or 3525 counting only the distinct ones).

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

The square root of 1900089 is about 1378.4371585241. The cubic root of 1900089 is about 123.8581668284.

The spelling of 1900089 in words is "one million, nine hundred thousand, eighty-nine".