7272270721 has 2 divisors, whose sum is σ = 7272270722. Its totient is φ = 7272270720.

The previous prime is 7272270703. The next prime is 7272270757. The reversal of 7272270721 is 1270722727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7082905600 + 189365121 = 84160^2 + 13761^2 .

It is an emirp because it is prime and its reverse (1270722727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7272270721 - 2¹⁵ = 7272237953 is a prime.

It is not a weakly prime, because it can be changed into another prime (7272273721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3636135360 + 3636135361.

It is an arithmetic number, because the mean of its divisors is an integer number (3636135361).

Almost surely, 2^7272270721 is an apocalyptic number.

It is an amenable number.

7272270721 is a deficient number, since it is larger than the sum of its proper divisors (1).

7272270721 is an equidigital number, since it uses as much as digits as its factorization.

7272270721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38416, while the sum is 37.

The square root of 7272270721 is about 85277.6097284627. The cubic root of 7272270721 is about 1937.4180695761.

The spelling of 7272270721 in words is "seven billion, two hundred seventy-two million, two hundred seventy thousand, seven hundred twenty-one".