2730981 has 8 divisors (see below), whose sum is σ = 3972384. Its totient is φ = 1655120.

The previous prime is 2730979. The next prime is 2730983. The reversal of 2730981 is 1890372.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2730979) and next prime (2730983).

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 2730981 - 2¹ = 2730979 is a prime.

It is a super-2 number, since 2×2730981² = 14916514444722, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2730983) 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, 41346 + ... + 41411.

It is an arithmetic number, because the mean of its divisors is an integer number (496548).

2^2730981 is an apocalyptic number.

It is an amenable number.

2730981 is a deficient number, since it is larger than the sum of its proper divisors (1241403).

2730981 is a wasteful number, since it uses less digits than its factorization.

2730981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82771.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2730981 is about 1652.5680016266. The cubic root of 2730981 is about 139.7782373446.

The spelling of 2730981 in words is "two million, seven hundred thirty thousand, nine hundred eighty-one".