18715097 has 2 divisors, whose sum is σ = 18715098. Its totient is φ = 18715096.

The previous prime is 18715093. The next prime is 18715117. The reversal of 18715097 is 79051781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13980121 + 4734976 = 3739^2 + 2176^2 .

It is an emirp because it is prime and its reverse (79051781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18715097 - 2² = 18715093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18715097.

It is not a weakly prime, because it can be changed into another prime (18715093) 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 as a sum of consecutive naturals, namely, 9357548 + 9357549.

It is an arithmetic number, because the mean of its divisors is an integer number (9357549).

Almost surely, 2^18715097 is an apocalyptic number.

It is an amenable number.

18715097 is a deficient number, since it is larger than the sum of its proper divisors (1).

18715097 is an equidigital number, since it uses as much as digits as its factorization.

18715097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 18715097 is about 4326.0948903139. The cubic root of 18715097 is about 265.4996955840.

The spelling of 18715097 in words is "eighteen million, seven hundred fifteen thousand, ninety-seven".