136844437 has 2 divisors, whose sum is σ = 136844438. Its totient is φ = 136844436.

The previous prime is 136844419. The next prime is 136844459. The reversal of 136844437 is 734448631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110691441 + 26152996 = 10521^2 + 5114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136844437 is a prime.

It is equal to p_7743937 and since 136844437 and 7743937 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136844437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136844737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68422218 + 68422219.

It is an arithmetic number, because the mean of its divisors is an integer number (68422219).

Almost surely, 2^136844437 is an apocalyptic number.

It is an amenable number.

136844437 is a deficient number, since it is larger than the sum of its proper divisors (1).

136844437 is an equidigital number, since it uses as much as digits as its factorization.

136844437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 40.

The square root of 136844437 is about 11698.0527011978. The cubic root of 136844437 is about 515.3184783495.

The spelling of 136844437 in words is "one hundred thirty-six million, eight hundred forty-four thousand, four hundred thirty-seven".