3947923879 has 8 divisors (see below), whose sum is σ = 4019753088. Its totient is φ = 3876474360.

The previous prime is 3947923871. The next prime is 3947923883. The reversal of 3947923879 is 9783297493.

3947923879 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 3947923879 - 2³ = 3947923871 is a prime.

It is a super-2 number, since 2×3947923879² = 31172205908756813282, 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 (3947923871) 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, 73897 + ... + 115570.

It is an arithmetic number, because the mean of its divisors is an integer number (502469136).

Almost surely, 2^3947923879 is an apocalyptic number.

3947923879 is a deficient number, since it is larger than the sum of its proper divisors (71829209).

3947923879 is a wasteful number, since it uses less digits than its factorization.

3947923879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189845.

The product of its digits is 20575296, while the sum is 61.

The square root of 3947923879 is about 62832.5065471687. The cubic root of 3947923879 is about 1580.4821312119.

The spelling of 3947923879 in words is "three billion, nine hundred forty-seven million, nine hundred twenty-three thousand, eight hundred seventy-nine".