7318397 has 2 divisors, whose sum is σ = 7318398. Its totient is φ = 7318396.

The previous prime is 7318379. The next prime is 7318429. The reversal of 7318397 is 7938137.

It is a happy number.

Together with previous prime (7318379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6280036 + 1038361 = 2506^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 7318397 - 2¹⁴ = 7302013 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 7318397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7318307) 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 as a sum of consecutive naturals, namely, 3659198 + 3659199.

It is an arithmetic number, because the mean of its divisors is an integer number (3659199).

Almost surely, 2^7318397 is an apocalyptic number.

It is an amenable number.

7318397 is a deficient number, since it is larger than the sum of its proper divisors (1).

7318397 is an equidigital number, since it uses as much as digits as its factorization.

7318397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 38.

The square root of 7318397 is about 2705.2535925491. The cubic root of 7318397 is about 194.1505633175.

The spelling of 7318397 in words is "seven million, three hundred eighteen thousand, three hundred ninety-seven".