4013333981 has 2 divisors, whose sum is σ = 4013333982. Its totient is φ = 4013333980.

The previous prime is 4013333971. The next prime is 4013334023. The reversal of 4013333981 is 1893333104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2574649081 + 1438684900 = 50741^2 + 37930^2 .

It is a cyclic number.

It is not a de Polignac number, because 4013333981 - 2³⁰ = 2939592157 is a prime.

It is a super-2 number, since 2×4013333981² = 32213699286098616722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4013333941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006666990 + 2006666991.

It is an arithmetic number, because the mean of its divisors is an integer number (2006666991).

Almost surely, 2^4013333981 is an apocalyptic number.

It is an amenable number.

4013333981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4013333981 is an equidigital number, since it uses as much as digits as its factorization.

4013333981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 4013333981 is about 63350.8798754998. The cubic root of 4013333981 is about 1589.1629602673.

The spelling of 4013333981 in words is "four billion, thirteen million, three hundred thirty-three thousand, nine hundred eighty-one".