7118381 has 2 divisors, whose sum is σ = 7118382. Its totient is φ = 7118380.

The previous prime is 7118341. The next prime is 7118387. The reversal of 7118381 is 1838117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6421156 + 697225 = 2534^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 7118381 - 2⁶ = 7118317 is a prime.

It is a super-2 number, since 2×7118381² = 101342696122322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7118387) 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, 3559190 + 3559191.

It is an arithmetic number, because the mean of its divisors is an integer number (3559191).

Almost surely, 2^7118381 is an apocalyptic number.

It is an amenable number.

7118381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7118381 is an equidigital number, since it uses as much as digits as its factorization.

7118381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 29.

The square root of 7118381 is about 2668.0294226264. The cubic root of 7118381 is about 192.3654516022.

The spelling of 7118381 in words is "seven million, one hundred eighteen thousand, three hundred eighty-one".