3977639945 has 8 divisors (see below), whose sum is σ = 4783479936. Its totient is φ = 3175237296.

The previous prime is 3977639933. The next prime is 3977640011. The reversal of 3977639945 is 5499367793.

3977639945 is digitally balanced in base 2, because in such base 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 3977639945 - 2¹⁰ = 3977638921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 856787 + ... + 861416.

It is an arithmetic number, because the mean of its divisors is an integer number (597934992).

Almost surely, 2^3977639945 is an apocalyptic number.

It is an amenable number.

3977639945 is a deficient number, since it is larger than the sum of its proper divisors (805839991).

3977639945 is a wasteful number, since it uses less digits than its factorization.

3977639945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718671.

The product of its digits is 38578680, while the sum is 62.

The square root of 3977639945 is about 63068.5337153164. The cubic root of 3977639945 is about 1584.4376587175.

The spelling of 3977639945 in words is "three billion, nine hundred seventy-seven million, six hundred thirty-nine thousand, nine hundred forty-five".