7438987 has 2 divisors, whose sum is σ = 7438988. Its totient is φ = 7438986.

The previous prime is 7438973. The next prime is 7438997. The reversal of 7438987 is 7898347.

It is a strong prime.

It is an emirp because it is prime and its reverse (7898347) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7438987 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (7438927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3719493 + 3719494.

It is an arithmetic number, because the mean of its divisors is an integer number (3719494).

Almost surely, 2^7438987 is an apocalyptic number.

7438987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7438987 is an equidigital number, since it uses as much as digits as its factorization.

7438987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 7438987 is about 2727.4506411666. The cubic root of 7438987 is about 195.2111410123.

It can be divided in two parts, 743 and 8987, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 7438987 in words is "seven million, four hundred thirty-eight thousand, nine hundred eighty-seven".