7289987 has 2 divisors, whose sum is σ = 7289988. Its totient is φ = 7289986.

The previous prime is 7289959. The next prime is 7289993. The reversal of 7289987 is 7899827.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7289987 - 2⁸ = 7289731 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7289917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3644993 + 3644994.

It is an arithmetic number, because the mean of its divisors is an integer number (3644994).

Almost surely, 2^7289987 is an apocalyptic number.

7289987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7289987 is an equidigital number, since it uses as much as digits as its factorization.

7289987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 50.

The square root of 7289987 is about 2699.9975925915. The cubic root of 7289987 is about 193.8990068450.

The spelling of 7289987 in words is "seven million, two hundred eighty-nine thousand, nine hundred eighty-seven".