6739987 has 2 divisors, whose sum is σ = 6739988. Its totient is φ = 6739986.

The previous prime is 6739981. The next prime is 6740021. The reversal of 6739987 is 7899376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6739987 - 2³ = 6739979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6739987.

It is not a weakly prime, because it can be changed into another prime (6739981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3369993 + 3369994.

It is an arithmetic number, because the mean of its divisors is an integer number (3369994).

Almost surely, 2^6739987 is an apocalyptic number.

6739987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6739987 is an equidigital number, since it uses as much as digits as its factorization.

6739987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The square root of 6739987 is about 2596.1484934418. The cubic root of 6739987 is about 188.8946624277.

The spelling of 6739987 in words is "six million, seven hundred thirty-nine thousand, nine hundred eighty-seven".