1800097 has 4 divisors (see below), whose sum is σ = 1938580. Its totient is φ = 1661616.

The previous prime is 1800091. The next prime is 1800103. The reversal of 1800097 is 7900081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7900081 = 7 ⋅1128583.

It is an interprime number because it is at equal distance from previous prime (1800091) and next prime (1800103).

It can be written as a sum of positive squares in 2 ways, for example, as 463761 + 1336336 = 681^2 + 1156^2 .

It is a cyclic number.

It is not a de Polignac number, because 1800097 - 2⁷ = 1799969 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 (1800091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69222 + ... + 69247.

It is an arithmetic number, because the mean of its divisors is an integer number (484645).

2^1800097 is an apocalyptic number.

It is an amenable number.

1800097 is a deficient number, since it is larger than the sum of its proper divisors (138483).

1800097 is a wasteful number, since it uses less digits than its factorization.

1800097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138482.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1800097 is about 1341.6769357785. The cubic root of 1800097 is about 121.6462249596.

The spelling of 1800097 in words is "one million, eight hundred thousand, ninety-seven".