1868393 has 4 divisors (see below), whose sum is σ = 1911888. Its totient is φ = 1824900.

The previous prime is 1868387. The next prime is 1868407. The reversal of 1868393 is 3938681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1868393 - 2¹² = 1864297 is a prime.

It is a Duffinian 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, 21683 + ... + 21768.

It is an arithmetic number, because the mean of its divisors is an integer number (477972).

2^1868393 is an apocalyptic number.

It is an amenable number.

1868393 is a deficient number, since it is larger than the sum of its proper divisors (43495).

1868393 is an equidigital number, since it uses as much as digits as its factorization.

1868393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43494.

The product of its digits is 31104, while the sum is 38.

The square root of 1868393 is about 1366.8917294358. The cubic root of 1868393 is about 123.1655953644.

The spelling of 1868393 in words is "one million, eight hundred sixty-eight thousand, three hundred ninety-three".