7220370397 has 4 divisors (see below), whose sum is σ = 7224219036. Its totient is φ = 7216521760.

The previous prime is 7220370389. The next prime is 7220370401. The reversal of 7220370397 is 7930730227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4145556996 + 3074813401 = 64386^2 + 55451^2 .

It is a cyclic number.

It is not a de Polignac number, because 7220370397 - 2³ = 7220370389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220370317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1921504 + ... + 1925257.

It is an arithmetic number, because the mean of its divisors is an integer number (1806054759).

Almost surely, 2^7220370397 is an apocalyptic number.

It is an amenable number.

7220370397 is a deficient number, since it is larger than the sum of its proper divisors (3848639).

7220370397 is a wasteful number, since it uses less digits than its factorization.

7220370397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848638.

The product of its (nonzero) digits is 111132, while the sum is 40.

The square root of 7220370397 is about 84972.7626772250. The cubic root of 7220370397 is about 1932.7981102620.

The spelling of 7220370397 in words is "seven billion, two hundred twenty million, three hundred seventy thousand, three hundred ninety-seven".