136139867 has 2 divisors, whose sum is σ = 136139868. Its totient is φ = 136139866.

The previous prime is 136139863. The next prime is 136139911. The reversal of 136139867 is 768931631.

It is an a-pointer prime, because the next prime (136139911) can be obtained adding 136139867 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136139867 - 2² = 136139863 is a prime.

It is a super-3 number, since 3×136139867³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136139863) 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 as a sum of consecutive naturals, namely, 68069933 + 68069934.

It is an arithmetic number, because the mean of its divisors is an integer number (68069934).

Almost surely, 2^136139867 is an apocalyptic number.

136139867 is a deficient number, since it is larger than the sum of its proper divisors (1).

136139867 is an equidigital number, since it uses as much as digits as its factorization.

136139867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 136139867 is about 11667.8989968203. The cubic root of 136139867 is about 514.4325505948.

The spelling of 136139867 in words is "one hundred thirty-six million, one hundred thirty-nine thousand, eight hundred sixty-seven".