136518971 has 16 divisors (see below), whose sum is σ = 148206240. Its totient is φ = 125326080.

The previous prime is 136518929. The next prime is 136518983. The reversal of 136518971 is 179815631.

It is a cyclic number.

It is not a de Polignac number, because 136518971 - 2¹⁰ = 136517947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136518901) 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, 134261 + ... + 135273.

It is an arithmetic number, because the mean of its divisors is an integer number (9262890).

Almost surely, 2^136518971 is an apocalyptic number.

136518971 is a deficient number, since it is larger than the sum of its proper divisors (11687269).

136518971 is a wasteful number, since it uses less digits than its factorization.

136518971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246.

The product of its digits is 45360, while the sum is 41.

The square root of 136518971 is about 11684.1333011910. The cubic root of 136518971 is about 514.9096155831.

It can be divided in two parts, 13651 and 8971, that added together give a palindrome (22622).

The spelling of 136518971 in words is "one hundred thirty-six million, five hundred eighteen thousand, nine hundred seventy-one".