7318889 has 2 divisors, whose sum is σ = 7318890. Its totient is φ = 7318888.

The previous prime is 7318867. The next prime is 7318903. The reversal of 7318889 is 9888137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5017600 + 2301289 = 2240^2 + 1517^2 .

It is a cyclic number.

It is not a de Polignac number, because 7318889 - 2¹² = 7314793 is a prime.

It is a super-2 number, since 2×7318889² = 107132272388642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7318849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3659444 + 3659445.

It is an arithmetic number, because the mean of its divisors is an integer number (3659445).

Almost surely, 2^7318889 is an apocalyptic number.

It is an amenable number.

7318889 is a deficient number, since it is larger than the sum of its proper divisors (1).

7318889 is an equidigital number, since it uses as much as digits as its factorization.

7318889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 7318889 is about 2705.3445251945. The cubic root of 7318889 is about 194.1549139941.

The spelling of 7318889 in words is "seven million, three hundred eighteen thousand, eight hundred eighty-nine".