136780673 has 2 divisors, whose sum is σ = 136780674. Its totient is φ = 136780672.

The previous prime is 136780621. The next prime is 136780729. The reversal of 136780673 is 376087631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128300929 + 8479744 = 11327^2 + 2912^2 .

It is a cyclic number.

It is not a de Polignac number, because 136780673 - 2²² = 132586369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136780673.

It is not a weakly prime, because it can be changed into another prime (136780613) 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, 68390336 + 68390337.

It is an arithmetic number, because the mean of its divisors is an integer number (68390337).

Almost surely, 2^136780673 is an apocalyptic number.

It is an amenable number.

136780673 is a deficient number, since it is larger than the sum of its proper divisors (1).

136780673 is an equidigital number, since it uses as much as digits as its factorization.

136780673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 136780673 is about 11695.3269727699. The cubic root of 136780673 is about 515.2384266910.

The spelling of 136780673 in words is "one hundred thirty-six million, seven hundred eighty thousand, six hundred seventy-three".