7289449897 has 4 divisors (see below), whose sum is σ = 7289650116. Its totient is φ = 7289249680.

The previous prime is 7289449891. The next prime is 7289449903. The reversal of 7289449897 is 7989449827.

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

It is an interprime number because it is at equal distance from previous prime (7289449891) and next prime (7289449903).

It can be written as a sum of positive squares in 2 ways, for example, as 2205617296 + 5083832601 = 46964^2 + 71301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7289449897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7289449891) 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, 28354 + ... + 124027.

It is an arithmetic number, because the mean of its divisors is an integer number (1822412529).

Almost surely, 2^7289449897 is an apocalyptic number.

It is an amenable number.

7289449897 is a deficient number, since it is larger than the sum of its proper divisors (200219).

7289449897 is a wasteful number, since it uses less digits than its factorization.

7289449897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200218.

The product of its digits is 73156608, while the sum is 67.

The square root of 7289449897 is about 85378.2753222387. The cubic root of 7289449897 is about 1938.9424477448.

The spelling of 7289449897 in words is "seven billion, two hundred eighty-nine million, four hundred forty-nine thousand, eight hundred ninety-seven".