3099981 has 8 divisors (see below), whose sum is σ = 4150080. Its totient is φ = 2058272.

The previous prime is 3099977. The next prime is 3099997. The reversal of 3099981 is 1899903.

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 3099981 - 2² = 3099977 is a prime.

It is a super-2 number, since 2×3099981² = 19219764400722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3099911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1176 + ... + 2753.

It is an arithmetic number, because the mean of its divisors is an integer number (518760).

Almost surely, 2^3099981 is an apocalyptic number.

It is an amenable number.

3099981 is a deficient number, since it is larger than the sum of its proper divisors (1050099).

3099981 is a wasteful number, since it uses less digits than its factorization.

3099981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4195.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 3099981 is about 1760.6762905202. The cubic root of 3099981 is about 145.8096756907.

The spelling of 3099981 in words is "three million, ninety-nine thousand, nine hundred eighty-one".