1790399 has 4 divisors (see below), whose sum is σ = 1928136. Its totient is φ = 1652664.

The previous prime is 1790363. The next prime is 1790401. The reversal of 1790399 is 9930971.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9930971 = 593 ⋅16747.

It is a de Polignac number, because none of the positive numbers 2^k-1790399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1790309) 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, 68849 + ... + 68874.

It is an arithmetic number, because the mean of its divisors is an integer number (482034).

2^1790399 is an apocalyptic number.

1790399 is a deficient number, since it is larger than the sum of its proper divisors (137737).

1790399 is a wasteful number, since it uses less digits than its factorization.

1790399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137736.

The product of its (nonzero) digits is 15309, while the sum is 38.

The square root of 1790399 is about 1338.0579210184. The cubic root of 1790399 is about 121.4273756350.

The spelling of 1790399 in words is "one million, seven hundred ninety thousand, three hundred ninety-nine".