6990210961 has 2 divisors, whose sum is σ = 6990210962. Its totient is φ = 6990210960.

The previous prime is 6990210949. The next prime is 6990210973. The reversal of 6990210961 is 1690120996.

It is a balanced prime because it is at equal distance from previous prime (6990210949) and next prime (6990210973).

It can be written as a sum of positive squares in only one way, i.e., 6649587025 + 340623936 = 81545^2 + 18456^2 .

It is a cyclic number.

It is not a de Polignac number, because 6990210961 - 2⁷ = 6990210833 is a prime.

It is not a weakly prime, because it can be changed into another prime (6990210901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495105480 + 3495105481.

It is an arithmetic number, because the mean of its divisors is an integer number (3495105481).

Almost surely, 2^6990210961 is an apocalyptic number.

It is an amenable number.

6990210961 is a deficient number, since it is larger than the sum of its proper divisors (1).

6990210961 is an equidigital number, since it uses as much as digits as its factorization.

6990210961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 6990210961 is about 83607.4814893978. The cubic root of 6990210961 is about 1912.0390640270.

The spelling of 6990210961 in words is "six billion, nine hundred ninety million, two hundred ten thousand, nine hundred sixty-one".