134016721 has 2 divisors, whose sum is σ = 134016722. Its totient is φ = 134016720.

The previous prime is 134016703. The next prime is 134016733. The reversal of 134016721 is 127610431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133656721 + 360000 = 11561^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 134016721 - 2²¹ = 131919569 is a prime.

It is not a weakly prime, because it can be changed into another prime (134016761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67008360 + 67008361.

It is an arithmetic number, because the mean of its divisors is an integer number (67008361).

Almost surely, 2^134016721 is an apocalyptic number.

It is an amenable number.

134016721 is a deficient number, since it is larger than the sum of its proper divisors (1).

134016721 is an equidigital number, since it uses as much as digits as its factorization.

134016721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 134016721 is about 11576.5591174580. The cubic root of 134016721 is about 511.7442786820.

The spelling of 134016721 in words is "one hundred thirty-four million, sixteen thousand, seven hundred twenty-one".