136691139 has 32 divisors (see below), whose sum is σ = 207051264. Its totient is φ = 79580160.

The previous prime is 136691129. The next prime is 136691143. The reversal of 136691139 is 931196631.

136691139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 136691139 - 2⁹ = 136690627 is a prime.

It is a super-2 number, since 2×136691139² = 37368934962234642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 136691097 and 136691106.

It is not an unprimeable number, because it can be changed into a prime (136691129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86224 + ... + 87794.

It is an arithmetic number, because the mean of its divisors is an integer number (6470352).

Almost surely, 2^136691139 is an apocalyptic number.

136691139 is a deficient number, since it is larger than the sum of its proper divisors (70360125).

136691139 is a wasteful number, since it uses less digits than its factorization.

136691139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707.

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

The square root of 136691139 is about 11691.4985780267. The cubic root of 136691139 is about 515.1259804282.

The spelling of 136691139 in words is "one hundred thirty-six million, six hundred ninety-one thousand, one hundred thirty-nine".