6991143101 has 2 divisors, whose sum is σ = 6991143102. Its totient is φ = 6991143100.

The previous prime is 6991143097. The next prime is 6991143113. The reversal of 6991143101 is 1013411996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6363891076 + 627252025 = 79774^2 + 25045^2 .

It is a cyclic number.

It is not a de Polignac number, because 6991143101 - 2² = 6991143097 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6991143161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495571550 + 3495571551.

It is an arithmetic number, because the mean of its divisors is an integer number (3495571551).

Almost surely, 2^6991143101 is an apocalyptic number.

It is an amenable number.

6991143101 is a deficient number, since it is larger than the sum of its proper divisors (1).

6991143101 is an equidigital number, since it uses as much as digits as its factorization.

6991143101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 6991143101 is about 83613.0558047007. The cubic root of 6991143101 is about 1912.1240499636.

The spelling of 6991143101 in words is "six billion, nine hundred ninety-one million, one hundred forty-three thousand, one hundred one".