3108691 has 2 divisors, whose sum is σ = 3108692. Its totient is φ = 3108690.

The previous prime is 3108689. The next prime is 3108697. The reversal of 3108691 is 1968013.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3108691 - 2¹ = 3108689 is a prime.

Together with 3108689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3108697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1554345 + 1554346.

It is an arithmetic number, because the mean of its divisors is an integer number (1554346).

Almost surely, 2^3108691 is an apocalyptic number.

3108691 is a deficient number, since it is larger than the sum of its proper divisors (1).

3108691 is an equidigital number, since it uses as much as digits as its factorization.

3108691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 3108691 is about 1763.1480368931. The cubic root of 3108691 is about 145.9461082139.

It can be divided in two parts, 3108 and 691, that multiplied together give a triangular number (2147628 = T₂₀₇₂).

The spelling of 3108691 in words is "three million, one hundred eight thousand, six hundred ninety-one".