7287997 has 2 divisors, whose sum is σ = 7287998. Its totient is φ = 7287996.

The previous prime is 7287991. The next prime is 7288013. The reversal of 7287997 is 7997827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4239481 + 3048516 = 2059^2 + 1746^2 .

It is a cyclic number.

It is not a de Polignac number, because 7287997 - 2¹⁹ = 6763709 is a prime.

It is a super-2 number, since 2×7287997² = 106229800544018, which contains 22 as substring.

It is a Chen prime.

7287997 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7287997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7287991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3643998 + 3643999.

It is an arithmetic number, because the mean of its divisors is an integer number (3643999).

Almost surely, 2^7287997 is an apocalyptic number.

It is an amenable number.

7287997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7287997 is an equidigital number, since it uses as much as digits as its factorization.

7287997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 49.

The square root of 7287997 is about 2699.6290485917. The cubic root of 7287997 is about 193.8813619055.

The spelling of 7287997 in words is "seven million, two hundred eighty-seven thousand, nine hundred ninety-seven".