4529944721 has 2 divisors, whose sum is σ = 4529944722. Its totient is φ = 4529944720.

The previous prime is 4529944687. The next prime is 4529944751. The reversal of 4529944721 is 1274499254.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4524445696 + 5499025 = 67264^2 + 2345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4529944721 is a prime.

It is not a weakly prime, because it can be changed into another prime (4529944751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2264972360 + 2264972361.

It is an arithmetic number, because the mean of its divisors is an integer number (2264972361).

Almost surely, 2^4529944721 is an apocalyptic number.

It is an amenable number.

4529944721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4529944721 is an equidigital number, since it uses as much as digits as its factorization.

4529944721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 4529944721 is about 67304.8640218521. The cubic root of 4529944721 is about 1654.6175792416.

The spelling of 4529944721 in words is "four billion, five hundred twenty-nine million, nine hundred forty-four thousand, seven hundred twenty-one".