3781979971 has 32 divisors (see below), whose sum is σ = 4768727040. Its totient is φ = 2913732000.

The previous prime is 3781979969. The next prime is 3781980017. The reversal of 3781979971 is 1799791873.

It is a cyclic number.

It is not a de Polignac number, because 3781979971 - 2¹ = 3781979969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3781979911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3285246 + ... + 3286396.

It is an arithmetic number, because the mean of its divisors is an integer number (149022720).

Almost surely, 2^3781979971 is an apocalyptic number.

3781979971 is a deficient number, since it is larger than the sum of its proper divisors (986747069).

3781979971 is a wasteful number, since it uses less digits than its factorization.

3781979971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615.

The product of its digits is 6001128, while the sum is 61.

The square root of 3781979971 is about 61497.8046030913. The cubic root of 3781979971 is about 1558.0201668832.

The spelling of 3781979971 in words is "three billion, seven hundred eighty-one million, nine hundred seventy-nine thousand, nine hundred seventy-one".