3100840861 has 2 divisors, whose sum is σ = 3100840862. Its totient is φ = 3100840860.

The previous prime is 3100840859. The next prime is 3100840867. The reversal of 3100840861 is 1680480013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2265284025 + 835556836 = 47595^2 + 28906^2 .

It is an emirp because it is prime and its reverse (1680480013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3100840861 - 2¹ = 3100840859 is a prime.

Together with 3100840859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3100840867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1550420430 + 1550420431.

It is an arithmetic number, because the mean of its divisors is an integer number (1550420431).

Almost surely, 2^3100840861 is an apocalyptic number.

It is an amenable number.

3100840861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3100840861 is an equidigital number, since it uses as much as digits as its factorization.

3100840861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 3100840861 is about 55685.1942710089. The cubic root of 3100840861 is about 1458.2315582315.

The spelling of 3100840861 in words is "three billion, one hundred million, eight hundred forty thousand, eight hundred sixty-one".