7271987 has 2 divisors, whose sum is σ = 7271988. Its totient is φ = 7271986.

The previous prime is 7271977. The next prime is 7271989. The reversal of 7271987 is 7891727.

It is a strong prime.

It is an emirp because it is prime and its reverse (7891727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7271987 - 2⁸ = 7271731 is a prime.

Together with 7271989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7271989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3635993 + 3635994.

It is an arithmetic number, because the mean of its divisors is an integer number (3635994).

Almost surely, 2^7271987 is an apocalyptic number.

7271987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7271987 is an equidigital number, since it uses as much as digits as its factorization.

7271987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 41.

The square root of 7271987 is about 2696.6621961232. The cubic root of 7271987 is about 193.7392873716.

The spelling of 7271987 in words is "seven million, two hundred seventy-one thousand, nine hundred eighty-seven".