3945217941 has 16 divisors (see below), whose sum is σ = 6679734400. Its totient is φ = 2254410144.

The previous prime is 3945217937. The next prime is 3945217943. The reversal of 3945217941 is 1497125493.

3945217941 is a `hidden beast` number, since 39 + 4 + 521 + 7 + 94 + 1 = 666.

It is not a de Polignac number, because 3945217941 - 2² = 3945217937 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 (3945217943) 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, 10436896 + ... + 10437273.

It is an arithmetic number, because the mean of its divisors is an integer number (417483400).

Almost surely, 2^3945217941 is an apocalyptic number.

It is an amenable number.

3945217941 is a deficient number, since it is larger than the sum of its proper divisors (2734516459).

3945217941 is a wasteful number, since it uses less digits than its factorization.

3945217941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20874185 (or 20874179 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 3945217941 is about 62810.9699097220. The cubic root of 3945217941 is about 1580.1209570647.

The spelling of 3945217941 in words is "three billion, nine hundred forty-five million, two hundred seventeen thousand, nine hundred forty-one".