3977514891 has 24 divisors (see below), whose sum is σ = 6911640320. Its totient is φ = 2153240496.

The previous prime is 3977514869. The next prime is 3977514917. The reversal of 3977514891 is 1984157793.

It is a happy number.

3977514891 is a `hidden beast` number, since 3 + 97 + 75 + 1 + 489 + 1 = 666.

3977514891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3977514891 - 2⁹ = 3977514379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3977514841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1660255 + ... + 1662648.

Almost surely, 2^3977514891 is an apocalyptic number.

3977514891 is a deficient number, since it is larger than the sum of its proper divisors (2934125429).

3977514891 is a wasteful number, since it uses less digits than its factorization.

3977514891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322935 (or 3322932 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 3977514891 is about 63067.5422939566. The cubic root of 3977514891 is about 1584.4210540352.

The spelling of 3977514891 in words is "three billion, nine hundred seventy-seven million, five hundred fourteen thousand, eight hundred ninety-one".