136578049 has 2 divisors, whose sum is σ = 136578050. Its totient is φ = 136578048.

The previous prime is 136578007. The next prime is 136578107. The reversal of 136578049 is 940875631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132987024 + 3591025 = 11532^2 + 1895^2 .

It is an emirp because it is prime and its reverse (940875631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136578049 - 2¹⁷ = 136446977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136577996 and 136578014.

It is not a weakly prime, because it can be changed into another prime (136578649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68289024 + 68289025.

It is an arithmetic number, because the mean of its divisors is an integer number (68289025).

Almost surely, 2^136578049 is an apocalyptic number.

It is an amenable number.

136578049 is a deficient number, since it is larger than the sum of its proper divisors (1).

136578049 is an equidigital number, since it uses as much as digits as its factorization.

136578049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 136578049 is about 11686.6611570628. The cubic root of 136578049 is about 514.9838798486.

The spelling of 136578049 in words is "one hundred thirty-six million, five hundred seventy-eight thousand, forty-nine".