136710391 has 2 divisors, whose sum is σ = 136710392. Its totient is φ = 136710390.

The previous prime is 136710389. The next prime is 136710397. The reversal of 136710391 is 193017631.

It is a weak prime.

It is an emirp because it is prime and its reverse (193017631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136710391 - 2¹ = 136710389 is a prime.

Together with 136710389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136710397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68355195 + 68355196.

It is an arithmetic number, because the mean of its divisors is an integer number (68355196).

Almost surely, 2^136710391 is an apocalyptic number.

136710391 is a deficient number, since it is larger than the sum of its proper divisors (1).

136710391 is an equidigital number, since it uses as much as digits as its factorization.

136710391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 136710391 is about 11692.3218823294. The cubic root of 136710391 is about 515.1501632682.

The spelling of 136710391 in words is "one hundred thirty-six million, seven hundred ten thousand, three hundred ninety-one".