1864397 has 4 divisors (see below), whose sum is σ = 1876896. Its totient is φ = 1851900.

The previous prime is 1864391. The next prime is 1864399. The reversal of 1864397 is 7934681.

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 1864397 - 2¹² = 1860301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1864397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1864391) 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, 6023 + ... + 6324.

It is an arithmetic number, because the mean of its divisors is an integer number (469224).

2^1864397 is an apocalyptic number.

It is an amenable number.

1864397 is a deficient number, since it is larger than the sum of its proper divisors (12499).

1864397 is a wasteful number, since it uses less digits than its factorization.

1864397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12498.

The product of its digits is 36288, while the sum is 38.

The square root of 1864397 is about 1365.4292365407. The cubic root of 1864397 is about 123.0777264471.

The spelling of 1864397 in words is "one million, eight hundred sixty-four thousand, three hundred ninety-seven".