7288661 has 2 divisors, whose sum is σ = 7288662. Its totient is φ = 7288660.

The previous prime is 7288651. The next prime is 7288691. The reversal of 7288661 is 1668827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6599761 + 688900 = 2569^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 7288661 - 2¹⁸ = 7026517 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7288601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3644330 + 3644331.

It is an arithmetic number, because the mean of its divisors is an integer number (3644331).

Almost surely, 2^7288661 is an apocalyptic number.

It is an amenable number.

7288661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7288661 is an equidigital number, since it uses as much as digits as its factorization.

7288661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 7288661 is about 2699.7520256498. The cubic root of 7288661 is about 193.8872498202.

The spelling of 7288661 in words is "seven million, two hundred eighty-eight thousand, six hundred sixty-one".