3123003981 has 16 divisors (see below), whose sum is σ = 4318081664. Its totient is φ = 2006057664.

The previous prime is 3123003979. The next prime is 3123004013. The reversal of 3123003981 is 1893003213.

It is not a de Polignac number, because 3123003981 - 2¹ = 3123003979 is a prime.

It is a super-2 number, since 2×3123003981² = 19506307730683696722, 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 (3123003901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125146 + ... + 148011.

It is an arithmetic number, because the mean of its divisors is an integer number (269880104).

Almost surely, 2^3123003981 is an apocalyptic number.

It is an amenable number.

3123003981 is a deficient number, since it is larger than the sum of its proper divisors (1195077683).

3123003981 is a wasteful number, since it uses less digits than its factorization.

3123003981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273300.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 3123003981 is about 55883.8436491264. The cubic root of 3123003981 is about 1461.6975284119.

The spelling of 3123003981 in words is "three billion, one hundred twenty-three million, three thousand, nine hundred eighty-one".