136781263 has 2 divisors, whose sum is σ = 136781264. Its totient is φ = 136781262.

The previous prime is 136781251. The next prime is 136781273. The reversal of 136781263 is 362187631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136781263 - 2⁹ = 136780751 is a prime.

It is a super-2 number, since 2×136781263² = 37418227815750338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136781213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68390631 + 68390632.

It is an arithmetic number, because the mean of its divisors is an integer number (68390632).

Almost surely, 2^136781263 is an apocalyptic number.

136781263 is a deficient number, since it is larger than the sum of its proper divisors (1).

136781263 is an equidigital number, since it uses as much as digits as its factorization.

136781263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 136781263 is about 11695.3521964924. The cubic root of 136781263 is about 515.2391675126.

It can be divided in two parts, 13678 and 1263, that added together give a palindrome (14941).

The spelling of 136781263 in words is "one hundred thirty-six million, seven hundred eighty-one thousand, two hundred sixty-three".