1987492847 has 8 divisors (see below), whose sum is σ = 2035448352. Its totient is φ = 1940092000.

The previous prime is 1987492769. The next prime is 1987492861. The reversal of 1987492847 is 7482947891.

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

It is a cyclic number.

It is not a de Polignac number, because 1987492847 - 2¹⁸ = 1987230703 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 (1987492867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131408 + ... + 145749.

It is an arithmetic number, because the mean of its divisors is an integer number (254431044).

Almost surely, 2^1987492847 is an apocalyptic number.

1987492847 is a deficient number, since it is larger than the sum of its proper divisors (47955505).

1987492847 is a wasteful number, since it uses less digits than its factorization.

1987492847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277329.

The product of its digits is 8128512, while the sum is 59.

The square root of 1987492847 is about 44581.3060261810. The cubic root of 1987492847 is about 1257.2892185710.

The spelling of 1987492847 in words is "one billion, nine hundred eighty-seven million, four hundred ninety-two thousand, eight hundred forty-seven".