3959440981 has 8 divisors (see below), whose sum is σ = 4194780480. Its totient is φ = 3724371648.

The previous prime is 3959440967. The next prime is 3959440999. The reversal of 3959440981 is 1890449593.

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 3959440981 - 2⁹ = 3959440469 is a prime.

It is a super-2 number, since 2×3959440981² = 31354345764044484722, 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 (3959440181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36961 + ... + 96358.

It is an arithmetic number, because the mean of its divisors is an integer number (524347560).

Almost surely, 2^3959440981 is an apocalyptic number.

It is an amenable number.

3959440981 is a deficient number, since it is larger than the sum of its proper divisors (235339499).

3959440981 is a wasteful number, since it uses less digits than its factorization.

3959440981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135083.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The square root of 3959440981 is about 62924.0890359169. The cubic root of 3959440981 is about 1582.0175291058.

The spelling of 3959440981 in words is "three billion, nine hundred fifty-nine million, four hundred forty thousand, nine hundred eighty-one".