6931961 has 2 divisors, whose sum is σ = 6931962. Its totient is φ = 6931960.

The previous prime is 6931919. The next prime is 6931997. The reversal of 6931961 is 1691396.

6931961 is nontrivially palindromic in base 11.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6661561 + 270400 = 2581^2 + 520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6931961 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a nialpdrome in base 14.

It is not a weakly prime, because it can be changed into another prime (6931361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3465980 + 3465981.

It is an arithmetic number, because the mean of its divisors is an integer number (3465981).

Almost surely, 2^6931961 is an apocalyptic number.

It is an amenable number.

6931961 is a deficient number, since it is larger than the sum of its proper divisors (1).

6931961 is an equidigital number, since it uses as much as digits as its factorization.

6931961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 35.

The square root of 6931961 is about 2632.8617510230. The cubic root of 6931961 is about 190.6713187095.

The spelling of 6931961 in words is "six million, nine hundred thirty-one thousand, nine hundred sixty-one".