5243473721 has 2 divisors, whose sum is σ = 5243473722. Its totient is φ = 5243473720.

The previous prime is 5243473709. The next prime is 5243473771. The reversal of 5243473721 is 1273743425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5204035321 + 39438400 = 72139^2 + 6280^2 .

It is a cyclic number.

It is not a de Polignac number, because 5243473721 - 2²² = 5239279417 is a prime.

It is not a weakly prime, because it can be changed into another prime (5243473771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2621736860 + 2621736861.

It is an arithmetic number, because the mean of its divisors is an integer number (2621736861).

Almost surely, 2^5243473721 is an apocalyptic number.

It is an amenable number.

5243473721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5243473721 is an equidigital number, since it uses as much as digits as its factorization.

5243473721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 38.

The square root of 5243473721 is about 72411.8341226073. The cubic root of 5243473721 is about 1737.2928485917.

The spelling of 5243473721 in words is "five billion, two hundred forty-three million, four hundred seventy-three thousand, seven hundred twenty-one".