7157387 has 2 divisors, whose sum is σ = 7157388. Its totient is φ = 7157386.

The previous prime is 7157377. The next prime is 7157389. The reversal of 7157387 is 7837517.

It is a strong prime.

It is an emirp because it is prime and its reverse (7837517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7157387 - 2⁸ = 7157131 is a prime.

Together with 7157389, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7157387.

It is not a weakly prime, because it can be changed into another prime (7157389) 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, 3578693 + 3578694.

It is an arithmetic number, because the mean of its divisors is an integer number (3578694).

Almost surely, 2^7157387 is an apocalyptic number.

7157387 is a deficient number, since it is larger than the sum of its proper divisors (1).

7157387 is an equidigital number, since it uses as much as digits as its factorization.

7157387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41160, while the sum is 38.

The square root of 7157387 is about 2675.3293255224. The cubic root of 7157387 is about 192.7161747563.

The spelling of 7157387 in words is "seven million, one hundred fifty-seven thousand, three hundred eighty-seven".