6931997 has 2 divisors, whose sum is σ = 6931998. Its totient is φ = 6931996.

The previous prime is 6931961. The next prime is 6932033. The reversal of 6931997 is 7991396.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (6931961) and next prime (6932033).

It can be written as a sum of positive squares in only one way, i.e., 5827396 + 1104601 = 2414^2 + 1051^2 .

It is a cyclic number.

It is not a de Polignac number, because 6931997 - 2¹² = 6927901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6931097) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3465998 + 3465999.

It is an arithmetic number, because the mean of its divisors is an integer number (3465999).

Almost surely, 2^6931997 is an apocalyptic number.

It is an amenable number.

6931997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6931997 is an equidigital number, since it uses as much as digits as its factorization.

6931997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 44.

The square root of 6931997 is about 2632.8685876815. The cubic root of 6931997 is about 190.6716487823.

The spelling of 6931997 in words is "six million, nine hundred thirty-one thousand, nine hundred ninety-seven".