3091985 has 8 divisors (see below), whose sum is σ = 3995880. Its totient is φ = 2283264.

The previous prime is 3091973. The next prime is 3091987. The reversal of 3091985 is 5891903.

3091985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 36481 + 3055504 = 191^2 + 1748^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3091985 - 2¹⁰ = 3090961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3091987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23720 + ... + 23849.

It is an arithmetic number, because the mean of its divisors is an integer number (499485).

Almost surely, 2^3091985 is an apocalyptic number.

It is an amenable number.

3091985 is a deficient number, since it is larger than the sum of its proper divisors (903895).

3091985 is a wasteful number, since it uses less digits than its factorization.

3091985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47587.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 3091985 is about 1758.4041060007. The cubic root of 3091985 is about 145.6842020152.

The spelling of 3091985 in words is "three million, ninety-one thousand, nine hundred eighty-five".