18273797 has 2 divisors, whose sum is σ = 18273798. Its totient is φ = 18273796.

The previous prime is 18273791. The next prime is 18273803. The reversal of 18273797 is 79737281.

It is a balanced prime because it is at equal distance from previous prime (18273791) and next prime (18273803).

It can be written as a sum of positive squares in only one way, i.e., 17255716 + 1018081 = 4154^2 + 1009^2 .

It is a cyclic number.

It is not a de Polignac number, because 18273797 - 2¹⁶ = 18208261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18273791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9136898 + 9136899.

It is an arithmetic number, because the mean of its divisors is an integer number (9136899).

Almost surely, 2^18273797 is an apocalyptic number.

It is an amenable number.

18273797 is a deficient number, since it is larger than the sum of its proper divisors (1).

18273797 is an equidigital number, since it uses as much as digits as its factorization.

18273797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148176, while the sum is 44.

The square root of 18273797 is about 4274.7861934838. The cubic root of 18273797 is about 263.3962567502.

The spelling of 18273797 in words is "eighteen million, two hundred seventy-three thousand, seven hundred ninety-seven".