6987983 has 2 divisors, whose sum is σ = 6987984. Its totient is φ = 6987982.

The previous prime is 6987979. The next prime is 6988039. The reversal of 6987983 is 3897896.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6987983 - 2² = 6987979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6987923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3493991 + 3493992.

It is an arithmetic number, because the mean of its divisors is an integer number (3493992).

Almost surely, 2^6987983 is an apocalyptic number.

6987983 is a deficient number, since it is larger than the sum of its proper divisors (1).

6987983 is an equidigital number, since it uses as much as digits as its factorization.

6987983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 6987983 is about 2643.4793360267. The cubic root of 6987983 is about 191.1835903676.

The spelling of 6987983 in words is "six million, nine hundred eighty-seven thousand, nine hundred eighty-three".