1806326897 has 4 divisors (see below), whose sum is σ = 1806653760. Its totient is φ = 1806000036.

The previous prime is 1806326887. The next prime is 1806326917. The reversal of 1806326897 is 7986236081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7986236081 = 17 ⋅469778593.

It is a cyclic number.

It is not a de Polignac number, because 1806326897 - 2⁴ = 1806326881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1806326887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154997 + ... + 166242.

It is an arithmetic number, because the mean of its divisors is an integer number (451663440).

Almost surely, 2^1806326897 is an apocalyptic number.

It is an amenable number.

1806326897 is a deficient number, since it is larger than the sum of its proper divisors (326863).

1806326897 is an equidigital number, since it uses as much as digits as its factorization.

1806326897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326862.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 1806326897 is about 42500.9046609599. The cubic root of 1806326897 is about 1217.8639719547.

The spelling of 1806326897 in words is "one billion, eight hundred six million, three hundred twenty-six thousand, eight hundred ninety-seven".