7738987 has 2 divisors, whose sum is σ = 7738988. Its totient is φ = 7738986.

The previous prime is 7738981. The next prime is 7739033. The reversal of 7738987 is 7898377.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7898377) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7738987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7738987.

It is not a weakly prime, because it can be changed into another prime (7738981) 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, 3869493 + 3869494.

It is an arithmetic number, because the mean of its divisors is an integer number (3869494).

Almost surely, 2^7738987 is an apocalyptic number.

7738987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7738987 is an equidigital number, since it uses as much as digits as its factorization.

7738987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 49.

The square root of 7738987 is about 2781.9034850260. The cubic root of 7738987 is about 197.8007978531.

The spelling of 7738987 in words is "seven million, seven hundred thirty-eight thousand, nine hundred eighty-seven".