136038591 has 24 divisors (see below), whose sum is σ = 212468256. Its totient is φ = 83378880.

The previous prime is 136038517. The next prime is 136038599. The reversal of 136038591 is 195830631.

It is a happy number.

136038591 is a `hidden beast` number, since 1 + 3 + 60 + 3 + 8 + 591 = 666.

It is not a de Polignac number, because 136038591 - 2¹⁸ = 135776447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136038599) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28561 + ... + 32981.

It is an arithmetic number, because the mean of its divisors is an integer number (8852844).

Almost surely, 2^136038591 is an apocalyptic number.

136038591 is a deficient number, since it is larger than the sum of its proper divisors (76429665).

136038591 is a wasteful number, since it uses less digits than its factorization.

136038591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703 (or 4700 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 136038591 is about 11663.5582478076. The cubic root of 136038591 is about 514.3049548688.

The spelling of 136038591 in words is "one hundred thirty-six million, thirty-eight thousand, five hundred ninety-one".