1890297 has 14 divisors (see below), whose sum is σ = 2835242. Its totient is φ = 1259712.

The previous prime is 1890289. The next prime is 1890299. The reversal of 1890297 is 7920981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1679616 + 210681 = 1296^2 + 459^2 .

It is not a de Polignac number, because 1890297 - 2³ = 1890289 is a prime.

It is a Duffinian number.

1890297 is a modest number, since divided by 297 gives 189 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1890299) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 568 + ... + 2025.

2^1890297 is an apocalyptic number.

It is an amenable number.

1890297 is a deficient number, since it is larger than the sum of its proper divisors (944945).

1890297 is an frugal number, since it uses more digits than its factorization.

1890297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611 (or 2596 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1890297 is about 1374.8807220992. The cubic root of 1890297 is about 123.6450349605.

It can be divided in two parts, 1890 and 297, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1890297 in words is "one million, eight hundred ninety thousand, two hundred ninety-seven".