7073733721 has 2 divisors, whose sum is σ = 7073733722. Its totient is φ = 7073733720.

The previous prime is 7073733683. The next prime is 7073733739. The reversal of 7073733721 is 1273373707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6949723225 + 124010496 = 83365^2 + 11136^2 .

It is a cyclic number.

It is not a de Polignac number, because 7073733721 - 2⁹ = 7073733209 is a prime.

It is a super-2 number, since 2×7073733721² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7073733761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3536866860 + 3536866861.

It is an arithmetic number, because the mean of its divisors is an integer number (3536866861).

Almost surely, 2^7073733721 is an apocalyptic number.

It is an amenable number.

7073733721 is a deficient number, since it is larger than the sum of its proper divisors (1).

7073733721 is an equidigital number, since it uses as much as digits as its factorization.

7073733721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129654, while the sum is 40.

The square root of 7073733721 is about 84105.4916221289. The cubic root of 7073733721 is about 1919.6242863830.

The spelling of 7073733721 in words is "seven billion, seventy-three million, seven hundred thirty-three thousand, seven hundred twenty-one".