7937987 has 2 divisors, whose sum is σ = 7937988. Its totient is φ = 7937986.

The previous prime is 7937983. The next prime is 7938023. The reversal of 7937987 is 7897397.

It is a weak prime.

It is an emirp because it is prime and its reverse (7897397) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7937987 - 2² = 7937983 is a prime.

It is a super-2 number, since 2×7937987² = 126023275224338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7937981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3968993 + 3968994.

It is an arithmetic number, because the mean of its divisors is an integer number (3968994).

Almost surely, 2^7937987 is an apocalyptic number.

7937987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7937987 is an equidigital number, since it uses as much as digits as its factorization.

7937987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 50.

The square root of 7937987 is about 2817.4433445945. The cubic root of 7937987 is about 199.4818839378.

The spelling of 7937987 in words is "seven million, nine hundred thirty-seven thousand, nine hundred eighty-seven".