134719721 has 2 divisors, whose sum is σ = 134719722. Its totient is φ = 134719720.

The previous prime is 134719699. The next prime is 134719729. The reversal of 134719721 is 127917431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105678400 + 29041321 = 10280^2 + 5389^2 .

It is an emirp because it is prime and its reverse (127917431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134719721 - 2¹⁸ = 134457577 is a prime.

It is not a weakly prime, because it can be changed into another prime (134719729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67359860 + 67359861.

It is an arithmetic number, because the mean of its divisors is an integer number (67359861).

Almost surely, 2^134719721 is an apocalyptic number.

It is an amenable number.

134719721 is a deficient number, since it is larger than the sum of its proper divisors (1).

134719721 is an equidigital number, since it uses as much as digits as its factorization.

134719721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 35.

The square root of 134719721 is about 11606.8824841126. The cubic root of 134719721 is about 512.6375229593.

The spelling of 134719721 in words is "one hundred thirty-four million, seven hundred nineteen thousand, seven hundred twenty-one".