6939164257 has 2 divisors, whose sum is σ = 6939164258. Its totient is φ = 6939164256.

The previous prime is 6939164233. The next prime is 6939164263. The reversal of 6939164257 is 7524619396.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6803115361 + 136048896 = 82481^2 + 11664^2 .

It is a cyclic number.

It is not a de Polignac number, because 6939164257 - 2¹⁹ = 6938639969 is a prime.

It is not a weakly prime, because it can be changed into another prime (6939164207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3469582128 + 3469582129.

It is an arithmetic number, because the mean of its divisors is an integer number (3469582129).

Almost surely, 2^6939164257 is an apocalyptic number.

It is an amenable number.

6939164257 is a deficient number, since it is larger than the sum of its proper divisors (1).

6939164257 is an equidigital number, since it uses as much as digits as its factorization.

6939164257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 52.

The square root of 6939164257 is about 83301.6461842142. The cubic root of 6939164257 is about 1907.3734038549.

The spelling of 6939164257 in words is "six billion, nine hundred thirty-nine million, one hundred sixty-four thousand, two hundred fifty-seven".