7381691 has 2 divisors, whose sum is σ = 7381692. Its totient is φ = 7381690.

The previous prime is 7381663. The next prime is 7381711. The reversal of 7381691 is 1961837.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7381691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7381601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3690845 + 3690846.

It is an arithmetic number, because the mean of its divisors is an integer number (3690846).

Almost surely, 2^7381691 is an apocalyptic number.

7381691 is a deficient number, since it is larger than the sum of its proper divisors (1).

7381691 is an equidigital number, since it uses as much as digits as its factorization.

7381691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 7381691 is about 2716.9267564658. The cubic root of 7381691 is about 194.7086686255.

The spelling of 7381691 in words is "seven million, three hundred eighty-one thousand, six hundred ninety-one".