136294487789 has 2 divisors, whose sum is σ = 136294487790. Its totient is φ = 136294487788.

The previous prime is 136294487779. The next prime is 136294487837. The reversal of 136294487789 is 987784492631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134499694564 + 1794793225 = 366742^2 + 42365^2 .

It is a cyclic number.

It is not a de Polignac number, because 136294487789 - 2⁸ = 136294487533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136294487779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68147243894 + 68147243895.

It is an arithmetic number, because the mean of its divisors is an integer number (68147243895).

Almost surely, 2^136294487789 is an apocalyptic number.

It is an amenable number.

136294487789 is a deficient number, since it is larger than the sum of its proper divisors (1).

136294487789 is an equidigital number, since it uses as much as digits as its factorization.

136294487789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 146313216, while the sum is 68.

The spelling of 136294487789 in words is "one hundred thirty-six billion, two hundred ninety-four million, four hundred eighty-seven thousand, seven hundred eighty-nine".