3958417021 has 8 divisors (see below), whose sum is σ = 4289065760. Its totient is φ = 3631504752.

The previous prime is 3958417013. The next prime is 3958417039. The reversal of 3958417021 is 1207148593.

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 3958417021 - 2³ = 3958417013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958417061) 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, 931911 + ... + 936148.

It is an arithmetic number, because the mean of its divisors is an integer number (536133220).

Almost surely, 2^3958417021 is an apocalyptic number.

It is an amenable number.

3958417021 is a deficient number, since it is larger than the sum of its proper divisors (330648739).

3958417021 is a wasteful number, since it uses less digits than its factorization.

3958417021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868235.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 3958417021 is about 62915.9520392086. The cubic root of 3958417021 is about 1581.8811409692.

The spelling of 3958417021 in words is "three billion, nine hundred fifty-eight million, four hundred seventeen thousand, twenty-one".