136856843 has 2 divisors, whose sum is σ = 136856844. Its totient is φ = 136856842.

The previous prime is 136856807. The next prime is 136856849. The reversal of 136856843 is 348658631.

It is a strong prime.

It is an emirp because it is prime and its reverse (348658631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136856843 - 2⁶ = 136856779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136856794 and 136856803.

It is not a weakly prime, because it can be changed into another prime (136856849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68428421 + 68428422.

It is an arithmetic number, because the mean of its divisors is an integer number (68428422).

Almost surely, 2^136856843 is an apocalyptic number.

136856843 is a deficient number, since it is larger than the sum of its proper divisors (1).

136856843 is an equidigital number, since it uses as much as digits as its factorization.

136856843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 44.

The square root of 136856843 is about 11698.5829483746. The cubic root of 136856843 is about 515.3340504059.

It can be divided in two parts, 13685 and 6843, that multiplied together give a triangular number (93646455 = T₁₃₆₈₅).

The spelling of 136856843 in words is "one hundred thirty-six million, eight hundred fifty-six thousand, eight hundred forty-three".