6989713 has 2 divisors, whose sum is σ = 6989714. Its totient is φ = 6989712.

The previous prime is 6989687. The next prime is 6989729. The reversal of 6989713 is 3179896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4981824 + 2007889 = 2232^2 + 1417^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6989713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6989713.

It is not a weakly prime, because it can be changed into another prime (6989743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494856 + 3494857.

It is an arithmetic number, because the mean of its divisors is an integer number (3494857).

Almost surely, 2^6989713 is an apocalyptic number.

It is an amenable number.

6989713 is a deficient number, since it is larger than the sum of its proper divisors (1).

6989713 is an equidigital number, since it uses as much as digits as its factorization.

6989713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 6989713 is about 2643.8065360385. The cubic root of 6989713 is about 191.1993660367.

The spelling of 6989713 in words is "six million, nine hundred eighty-nine thousand, seven hundred thirteen".