136981267 has 4 divisors (see below), whose sum is σ = 137549896. Its totient is φ = 136412640.

The previous prime is 136981259. The next prime is 136981283. The reversal of 136981267 is 762189631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136981267 - 2³ = 136981259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136981217) 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 in 3 ways as a sum of consecutive naturals, for example, 283953 + ... + 284434.

It is an arithmetic number, because the mean of its divisors is an integer number (34387474).

Almost surely, 2^136981267 is an apocalyptic number.

136981267 is a deficient number, since it is larger than the sum of its proper divisors (568629).

136981267 is an equidigital number, since it uses as much as digits as its factorization.

136981267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568628.

The product of its digits is 108864, while the sum is 43.

The square root of 136981267 is about 11703.8996492622. The cubic root of 136981267 is about 515.4901758399.

The spelling of 136981267 in words is "one hundred thirty-six million, nine hundred eighty-one thousand, two hundred sixty-seven".