8137691 has 2 divisors, whose sum is σ = 8137692. Its totient is φ = 8137690.

The previous prime is 8137651. The next prime is 8137697. The reversal of 8137691 is 1967318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8137691 - 2¹⁴ = 8121307 is a prime.

It is a super-2 number, since 2×8137691² = 132444029622962, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8137697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4068845 + 4068846.

It is an arithmetic number, because the mean of its divisors is an integer number (4068846).

Almost surely, 2^8137691 is an apocalyptic number.

8137691 is a deficient number, since it is larger than the sum of its proper divisors (1).

8137691 is an equidigital number, since it uses as much as digits as its factorization.

8137691 is an odious number, because the sum of its binary digits is odd.

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

The square root of 8137691 is about 2852.6638427968. The cubic root of 8137691 is about 201.1409043112.

The spelling of 8137691 in words is "eight million, one hundred thirty-seven thousand, six hundred ninety-one".