7289861 has 2 divisors, whose sum is σ = 7289862. Its totient is φ = 7289860.

The previous prime is 7289857. The next prime is 7289911. The reversal of 7289861 is 1689827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5313025 + 1976836 = 2305^2 + 1406^2 .

It is a cyclic number.

It is not a de Polignac number, because 7289861 - 2² = 7289857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3289861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3644930 + 3644931.

It is an arithmetic number, because the mean of its divisors is an integer number (3644931).

Almost surely, 2^7289861 is an apocalyptic number.

It is an amenable number.

7289861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7289861 is an equidigital number, since it uses as much as digits as its factorization.

7289861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 41.

The square root of 7289861 is about 2699.9742591366. The cubic root of 7289861 is about 193.8978897229.

The spelling of 7289861 in words is "seven million, two hundred eighty-nine thousand, eight hundred sixty-one".