3081997 has 4 divisors (see below), whose sum is σ = 3085600. Its totient is φ = 3078396.

The previous prime is 3081959. The next prime is 3082021. The reversal of 3081997 is 7991803.

3081997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3081997 is a prime.

It is a Duffinian number.

3081997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3081907) 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 3 ways as a sum of consecutive naturals, for example, 298 + ... + 2500.

It is an arithmetic number, because the mean of its divisors is an integer number (771400).

Almost surely, 2^3081997 is an apocalyptic number.

It is an amenable number.

3081997 is a deficient number, since it is larger than the sum of its proper divisors (3603).

3081997 is a wasteful number, since it uses less digits than its factorization.

3081997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3602.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 3081997 is about 1755.5617334631. The cubic root of 3081997 is about 145.5271655249.

The spelling of 3081997 in words is "three million, eighty-one thousand, nine hundred ninety-seven".