1868331 has 4 divisors (see below), whose sum is σ = 2491112. Its totient is φ = 1245552.

The previous prime is 1868309. The next prime is 1868333. The reversal of 1868331 is 1338681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1338681 = 3 ⋅446227.

It is not a de Polignac number, because 1868331 - 2⁹ = 1867819 is a prime.

It is a super-2 number, since 2×1868331² = 6981321451122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

1868331 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1868333) 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, 311386 + ... + 311391.

It is an arithmetic number, because the mean of its divisors is an integer number (622778).

2^1868331 is an apocalyptic number.

1868331 is a deficient number, since it is larger than the sum of its proper divisors (622781).

1868331 is an equidigital number, since it uses as much as digits as its factorization.

1868331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622780.

The product of its digits is 3456, while the sum is 30.

The square root of 1868331 is about 1366.8690500556. The cubic root of 1868331 is about 123.1642329902.

The spelling of 1868331 in words is "one million, eight hundred sixty-eight thousand, three hundred thirty-one".