136947787 has 2 divisors, whose sum is σ = 136947788. Its totient is φ = 136947786.

The previous prime is 136947779. The next prime is 136947817. The reversal of 136947787 is 787749631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136947787 - 2³ = 136947779 is a prime.

It is not a weakly prime, because it can be changed into another prime (136947757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68473893 + 68473894.

It is an arithmetic number, because the mean of its divisors is an integer number (68473894).

Almost surely, 2^136947787 is an apocalyptic number.

136947787 is a deficient number, since it is larger than the sum of its proper divisors (1).

136947787 is an equidigital number, since it uses as much as digits as its factorization.

136947787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The square root of 136947787 is about 11702.4692693465. The cubic root of 136947787 is about 515.4481749208.

The spelling of 136947787 in words is "one hundred thirty-six million, nine hundred forty-seven thousand, seven hundred eighty-seven".