7297840069 has 4 divisors (see below), whose sum is σ = 7859212396. Its totient is φ = 6736467744.

The previous prime is 7297840057. The next prime is 7297840097. The reversal of 7297840069 is 9600487927.

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 1541583169 + 5756256900 = 39263^2 + 75870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7297840069 is a prime.

It is a super-2 number, since 2×7297840069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7297839998 and 7297840025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7297841069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280686144 + ... + 280686169.

It is an arithmetic number, because the mean of its divisors is an integer number (1964803099).

Almost surely, 2^7297840069 is an apocalyptic number.

It is an amenable number.

7297840069 is a deficient number, since it is larger than the sum of its proper divisors (561372327).

7297840069 is a wasteful number, since it uses less digits than its factorization.

7297840069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561372326.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 7297840069 is about 85427.3964779449. The cubic root of 7297840069 is about 1939.6860714443.

The spelling of 7297840069 in words is "seven billion, two hundred ninety-seven million, eight hundred forty thousand, sixty-nine".