7681243 has 2 divisors, whose sum is σ = 7681244. Its totient is φ = 7681242.

The previous prime is 7681231. The next prime is 7681283. The reversal of 7681243 is 3421867.

It is a weak prime.

It is an emirp because it is prime and its reverse (3421867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7681243 - 2¹³ = 7673051 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7681213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3840621 + 3840622.

It is an arithmetic number, because the mean of its divisors is an integer number (3840622).

Almost surely, 2^7681243 is an apocalyptic number.

7681243 is a deficient number, since it is larger than the sum of its proper divisors (1).

7681243 is an equidigital number, since it uses as much as digits as its factorization.

7681243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 7681243 is about 2771.5055475319. The cubic root of 7681243 is about 197.3076094751.

The spelling of 7681243 in words is "seven million, six hundred eighty-one thousand, two hundred forty-three".