1868397 has 8 divisors (see below), whose sum is σ = 2499456. Its totient is φ = 1241472.

The previous prime is 1868387. The next prime is 1868407. The reversal of 1868397 is 7938681.

It is an interprime number because it is at equal distance from previous prime (1868387) and next prime (1868407).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1868397 - 2⁴ = 1868381 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253 + ... + 1949.

It is an arithmetic number, because the mean of its divisors is an integer number (312432).

2^1868397 is an apocalyptic number.

It is an amenable number.

1868397 is a deficient number, since it is larger than the sum of its proper divisors (631059).

1868397 is a wasteful number, since it uses less digits than its factorization.

1868397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067.

The product of its digits is 72576, while the sum is 42.

The square root of 1868397 is about 1366.8931926087. The cubic root of 1868397 is about 123.1656832585.

The spelling of 1868397 in words is "one million, eight hundred sixty-eight thousand, three hundred ninety-seven".