136089691 has 2 divisors, whose sum is σ = 136089692. Its totient is φ = 136089690.

The previous prime is 136089683. The next prime is 136089697. The reversal of 136089691 is 196980631.

It is a strong prime.

It is an emirp because it is prime and its reverse (196980631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136089691 - 2³ = 136089683 is a prime.

It is not a weakly prime, because it can be changed into another prime (136089697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68044845 + 68044846.

It is an arithmetic number, because the mean of its divisors is an integer number (68044846).

Almost surely, 2^136089691 is an apocalyptic number.

136089691 is a deficient number, since it is larger than the sum of its proper divisors (1).

136089691 is an equidigital number, since it uses as much as digits as its factorization.

136089691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 136089691 is about 11665.7486257848. The cubic root of 136089691 is about 514.3693427092.

The spelling of 136089691 in words is "one hundred thirty-six million, eighty-nine thousand, six hundred ninety-one".