1798999 has 2 divisors, whose sum is σ = 1799000. Its totient is φ = 1798998.

The previous prime is 1798997. The next prime is 1799003. The reversal of 1798999 is 9998971.

It is a weak prime.

It is an emirp because it is prime and its reverse (9998971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1798999 - 2¹ = 1798997 is a prime.

Together with 1798997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1798997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899499 + 899500.

It is an arithmetic number, because the mean of its divisors is an integer number (899500).

2^1798999 is an apocalyptic number.

1798999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798999 is an equidigital number, since it uses as much as digits as its factorization.

1798999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 52.

The square root of 1798999 is about 1341.2676839468. The cubic root of 1798999 is about 121.6214865295.

The spelling of 1798999 in words is "one million, seven hundred ninety-eight thousand, nine hundred ninety-nine".