3998371487 has 4 divisors (see below), whose sum is σ = 4361859816. Its totient is φ = 3634883160.

The previous prime is 3998371483. The next prime is 3998371499. The reversal of 3998371487 is 7841738993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3998371487 - 2² = 3998371483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998371483) 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 3 ways as a sum of consecutive naturals, for example, 181744148 + ... + 181744169.

It is an arithmetic number, because the mean of its divisors is an integer number (1090464954).

Almost surely, 2^3998371487 is an apocalyptic number.

3998371487 is a deficient number, since it is larger than the sum of its proper divisors (363488329).

3998371487 is a wasteful number, since it uses less digits than its factorization.

3998371487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363488328.

The product of its digits is 9144576, while the sum is 59.

The square root of 3998371487 is about 63232.6773670070. The cubic root of 3998371487 is about 1587.1855974556.

The spelling of 3998371487 in words is "three billion, nine hundred ninety-eight million, three hundred seventy-one thousand, four hundred eighty-seven".