3987479806 has 4 divisors (see below), whose sum is σ = 5981219712. Its totient is φ = 1993739902.

The previous prime is 3987479791. The next prime is 3987479807. The reversal of 3987479806 is 6089747893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6089747893 = 19 ⋅320513047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987479807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996869950 + ... + 996869953.

It is an arithmetic number, because the mean of its divisors is an integer number (1495304928).

Almost surely, 2^3987479806 is an apocalyptic number.

3987479806 is a deficient number, since it is larger than the sum of its proper divisors (1993739906).

3987479806 is a wasteful number, since it uses less digits than its factorization.

3987479806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993739905.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The square root of 3987479806 is about 63146.4948037498. The cubic root of 3987479806 is about 1585.7431068530.

The spelling of 3987479806 in words is "three billion, nine hundred eighty-seven million, four hundred seventy-nine thousand, eight hundred six".