136803391 has 2 divisors, whose sum is σ = 136803392. Its totient is φ = 136803390.

The previous prime is 136803377. The next prime is 136803427. The reversal of 136803391 is 193308631.

It is a weak prime.

It is an emirp because it is prime and its reverse (193308631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136803391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136803311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68401695 + 68401696.

It is an arithmetic number, because the mean of its divisors is an integer number (68401696).

Almost surely, 2^136803391 is an apocalyptic number.

136803391 is a deficient number, since it is larger than the sum of its proper divisors (1).

136803391 is an equidigital number, since it uses as much as digits as its factorization.

136803391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 136803391 is about 11696.2981750638. The cubic root of 136803391 is about 515.2669505518.

It can be divided in two parts, 13680 and 3391, that added together give a palindrome (17071).

The spelling of 136803391 in words is "one hundred thirty-six million, eight hundred three thousand, three hundred ninety-one".