136136991 has 16 divisors (see below), whose sum is σ = 189646560. Its totient is φ = 86755200.

The previous prime is 136136983. The next prime is 136136993. The reversal of 136136991 is 199631631.

It is not a de Polignac number, because 136136991 - 2³ = 136136983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136136993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1041 + ... + 16533.

It is an arithmetic number, because the mean of its divisors is an integer number (11852910).

Almost surely, 2^136136991 is an apocalyptic number.

136136991 is a deficient number, since it is larger than the sum of its proper divisors (53509569).

136136991 is a wasteful number, since it uses less digits than its factorization.

136136991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15626.

The product of its digits is 26244, while the sum is 39.

The square root of 136136991 is about 11667.7757520446. The cubic root of 136136991 is about 514.4289280497.

The spelling of 136136991 in words is "one hundred thirty-six million, one hundred thirty-six thousand, nine hundred ninety-one".