4134537721 has 2 divisors, whose sum is σ = 4134537722. Its totient is φ = 4134537720.

The previous prime is 4134537713. The next prime is 4134537811. The reversal of 4134537721 is 1277354314.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3951882496 + 182655225 = 62864^2 + 13515^2 .

It is a cyclic number.

It is not a de Polignac number, because 4134537721 - 2³ = 4134537713 is a prime.

It is not a weakly prime, because it can be changed into another prime (4134507721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2067268860 + 2067268861.

It is an arithmetic number, because the mean of its divisors is an integer number (2067268861).

Almost surely, 2^4134537721 is an apocalyptic number.

It is an amenable number.

4134537721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4134537721 is an equidigital number, since it uses as much as digits as its factorization.

4134537721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 37.

The square root of 4134537721 is about 64300.3710798002. The cubic root of 4134537721 is about 1605.0022768898.

The spelling of 4134537721 in words is "four billion, one hundred thirty-four million, five hundred thirty-seven thousand, seven hundred twenty-one".