1988987413 has 8 divisors (see below), whose sum is σ = 2273510720. Its totient is φ = 1704559680.

The previous prime is 1988987389. The next prime is 1988987453. The reversal of 1988987413 is 3147898891.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1988987413 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 (1988987453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28318 + ... + 69136.

It is an arithmetic number, because the mean of its divisors is an integer number (284188840).

Almost surely, 2^1988987413 is an apocalyptic number.

It is an amenable number.

1988987413 is a deficient number, since it is larger than the sum of its proper divisors (284523307).

1988987413 is an equidigital number, since it uses as much as digits as its factorization.

1988987413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47787.

The product of its digits is 3483648, while the sum is 58.

The square root of 1988987413 is about 44598.0651261913. The cubic root of 1988987413 is about 1257.6042940690.

The spelling of 1988987413 in words is "one billion, nine hundred eighty-eight million, nine hundred eighty-seven thousand, four hundred thirteen".