6990761 has 2 divisors, whose sum is σ = 6990762. Its totient is φ = 6990760.

The previous prime is 6990751. The next prime is 6990799. The reversal of 6990761 is 1670996.

It is an a-pointer prime, because the next prime (6990799) can be obtained adding 6990761 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6990736 + 25 = 2644^2 + 5^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6990761 is a prime.

It is not a weakly prime, because it can be changed into another prime (6990701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495380 + 3495381.

It is an arithmetic number, because the mean of its divisors is an integer number (3495381).

Almost surely, 2^6990761 is an apocalyptic number.

It is an amenable number.

6990761 is a deficient number, since it is larger than the sum of its proper divisors (1).

6990761 is an equidigital number, since it uses as much as digits as its factorization.

6990761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 6990761 is about 2644.0047276811. The cubic root of 6990761 is about 191.2089213609.

The spelling of 6990761 in words is "six million, nine hundred ninety thousand, seven hundred sixty-one".