136894787 has 2 divisors, whose sum is σ = 136894788. Its totient is φ = 136894786.

The previous prime is 136894739. The next prime is 136894789. The reversal of 136894787 is 787498631.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136894787 is a prime.

Together with 136894789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136894789) 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, 68447393 + 68447394.

It is an arithmetic number, because the mean of its divisors is an integer number (68447394).

Almost surely, 2^136894787 is an apocalyptic number.

136894787 is a deficient number, since it is larger than the sum of its proper divisors (1).

136894787 is an equidigital number, since it uses as much as digits as its factorization.

136894787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 53.

The square root of 136894787 is about 11700.2045708611. The cubic root of 136894787 is about 515.3816720128.

The spelling of 136894787 in words is "one hundred thirty-six million, eight hundred ninety-four thousand, seven hundred eighty-seven".