136778087 has 2 divisors, whose sum is σ = 136778088. Its totient is φ = 136778086.

The previous prime is 136778069. The next prime is 136778099. The reversal of 136778087 is 780877631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136778087 - 2¹⁰ = 136777063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136778387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68389043 + 68389044.

It is an arithmetic number, because the mean of its divisors is an integer number (68389044).

Almost surely, 2^136778087 is an apocalyptic number.

136778087 is a deficient number, since it is larger than the sum of its proper divisors (1).

136778087 is an equidigital number, since it uses as much as digits as its factorization.

136778087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 47.

The square root of 136778087 is about 11695.2164152700. The cubic root of 136778087 is about 515.2351796071.

The spelling of 136778087 in words is "one hundred thirty-six million, seven hundred seventy-eight thousand, eighty-seven".