1799993 has 4 divisors (see below), whose sum is σ = 1938468. Its totient is φ = 1661520.

The previous prime is 1799983. The next prime is 1799999. The reversal of 1799993 is 3999971.

It is a happy number.

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 426409 + 1373584 = 653^2 + 1172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1799993 - 2⁶ = 1799929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1799999) 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, 69218 + ... + 69243.

It is an arithmetic number, because the mean of its divisors is an integer number (484617).

2^1799993 is an apocalyptic number.

1799993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1799993 is a deficient number, since it is larger than the sum of its proper divisors (138475).

1799993 is a wasteful number, since it uses less digits than its factorization.

1799993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138474.

The product of its digits is 137781, while the sum is 47.

The square root of 1799993 is about 1341.6381777514. The cubic root of 1799993 is about 121.6438822245.

The spelling of 1799993 in words is "one million, seven hundred ninety-nine thousand, nine hundred ninety-three".