6957989 has 2 divisors, whose sum is σ = 6957990. Its totient is φ = 6957988.

The previous prime is 6957967. The next prime is 6957997. The reversal of 6957989 is 9897596.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4452100 + 2505889 = 2110^2 + 1583^2 .

It is a cyclic number.

It is not a de Polignac number, because 6957989 - 2¹² = 6953893 is a prime.

It is a super-2 number, since 2×6957989² = 96827221848242, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6957989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6957389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3478994 + 3478995.

It is an arithmetic number, because the mean of its divisors is an integer number (3478995).

Almost surely, 2^6957989 is an apocalyptic number.

It is an amenable number.

6957989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6957989 is an equidigital number, since it uses as much as digits as its factorization.

6957989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 53.

The square root of 6957989 is about 2637.8000303283. The cubic root of 6957989 is about 190.9096637034.

The spelling of 6957989 in words is "six million, nine hundred fifty-seven thousand, nine hundred eighty-nine".