8409132691 has 2 divisors, whose sum is σ = 8409132692. Its totient is φ = 8409132690.

The previous prime is 8409132647. The next prime is 8409132713. The reversal of 8409132691 is 1962319048.

It is a happy number.

8409132691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8409132691 - 2²⁵ = 8375578259 is a prime.

It is a super-2 number, since 2×8409132691² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8409132601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4204566345 + 4204566346.

It is an arithmetic number, because the mean of its divisors is an integer number (4204566346).

Almost surely, 2^8409132691 is an apocalyptic number.

8409132691 is a deficient number, since it is larger than the sum of its proper divisors (1).

8409132691 is an equidigital number, since it uses as much as digits as its factorization.

8409132691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 8409132691 is about 91701.3232783475. The cubic root of 8409132691 is about 2033.5291479042.

The spelling of 8409132691 in words is "eight billion, four hundred nine million, one hundred thirty-two thousand, six hundred ninety-one".