1864993 has 4 divisors (see below), whose sum is σ = 2008468. Its totient is φ = 1721520.

The previous prime is 1864987. The next prime is 1865011. The reversal of 1864993 is 3994681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 898704 + 966289 = 948^2 + 983^2 .

It is a cyclic number.

It is not a de Polignac number, because 1864993 - 2¹³ = 1856801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1864693) 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, 71718 + ... + 71743.

It is an arithmetic number, because the mean of its divisors is an integer number (502117).

2^1864993 is an apocalyptic number.

1864993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1864993 is a deficient number, since it is larger than the sum of its proper divisors (143475).

1864993 is a wasteful number, since it uses less digits than its factorization.

1864993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143474.

The product of its digits is 46656, while the sum is 40.

The square root of 1864993 is about 1365.6474654903. The cubic root of 1864993 is about 123.0908399828.

The spelling of 1864993 in words is "one million, eight hundred sixty-four thousand, nine hundred ninety-three".