134728709 has 2 divisors, whose sum is σ = 134728710. Its totient is φ = 134728708.

The previous prime is 134728691. The next prime is 134728721. The reversal of 134728709 is 907827431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75777025 + 58951684 = 8705^2 + 7678^2 .

It is a cyclic number.

It is not a de Polignac number, because 134728709 - 2⁸ = 134728453 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 (134728799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67364354 + 67364355.

It is an arithmetic number, because the mean of its divisors is an integer number (67364355).

Almost surely, 2^134728709 is an apocalyptic number.

It is an amenable number.

134728709 is a deficient number, since it is larger than the sum of its proper divisors (1).

134728709 is an equidigital number, since it uses as much as digits as its factorization.

134728709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 134728709 is about 11607.2696617249. The cubic root of 134728709 is about 512.6489231304.

The spelling of 134728709 in words is "one hundred thirty-four million, seven hundred twenty-eight thousand, seven hundred nine".