43369702721 has 2 divisors, whose sum is σ = 43369702722. Its totient is φ = 43369702720.

The previous prime is 43369702703. The next prime is 43369702823. The reversal of 43369702721 is 12720796334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42906979600 + 462723121 = 207140^2 + 21511^2 .

It is a cyclic number.

It is not a de Polignac number, because 43369702721 - 2¹⁴ = 43369686337 is a prime.

It is a super-2 number, since 2×43369702721² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43369702021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21684851360 + 21684851361.

It is an arithmetic number, because the mean of its divisors is an integer number (21684851361).

Almost surely, 2^43369702721 is an apocalyptic number.

It is an amenable number.

43369702721 is a deficient number, since it is larger than the sum of its proper divisors (1).

43369702721 is an equidigital number, since it uses as much as digits as its factorization.

43369702721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 43369702721 in words is "forty-three billion, three hundred sixty-nine million, seven hundred two thousand, seven hundred twenty-one".