3130981 has 8 divisors (see below), whose sum is σ = 3591360. Its totient is φ = 2673888.

The previous prime is 3130979. The next prime is 3130987. The reversal of 3130981 is 1890313.

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

It is not a de Polignac number, because 3130981 - 2¹ = 3130979 is a prime.

It is a super-2 number, since 2×3130981² = 19606084044722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3130987) 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, 1785 + ... + 3073.

It is an arithmetic number, because the mean of its divisors is an integer number (448920).

Almost surely, 2^3130981 is an apocalyptic number.

It is an amenable number.

3130981 is a deficient number, since it is larger than the sum of its proper divisors (460379).

3130981 is a wasteful number, since it uses less digits than its factorization.

3130981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 3130981 is about 1769.4578265672. The cubic root of 3130981 is about 146.2940997358.

The spelling of 3130981 in words is "three million, one hundred thirty thousand, nine hundred eighty-one".