3987131979 has 8 divisors (see below), whose sum is σ = 5316470992. Its totient is φ = 2657940480.

The previous prime is 3987131977. The next prime is 3987131989. The reversal of 3987131979 is 9791317893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3987131979 - 2¹ = 3987131977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3987131977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72747 + ... + 115179.

It is an arithmetic number, because the mean of its divisors is an integer number (664558874).

Almost surely, 2^3987131979 is an apocalyptic number.

3987131979 is a deficient number, since it is larger than the sum of its proper divisors (1329339013).

3987131979 is a wasteful number, since it uses less digits than its factorization.

3987131979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73757.

The product of its digits is 2571912, while the sum is 57.

The square root of 3987131979 is about 63143.7406161529. The cubic root of 3987131979 is about 1585.6969975030.

The spelling of 3987131979 in words is "three billion, nine hundred eighty-seven million, one hundred thirty-one thousand, nine hundred seventy-nine".