1047928387 has 4 divisors (see below), whose sum is σ = 1143194616. Its totient is φ = 952662160.

The previous prime is 1047928381. The next prime is 1047928423. The reversal of 1047928387 is 7838297401.

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 1047928387 - 2²⁷ = 913710659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1047928387.

It is not an unprimeable number, because it can be changed into a prime (1047928381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47633098 + ... + 47633119.

It is an arithmetic number, because the mean of its divisors is an integer number (285798654).

Almost surely, 2^1047928387 is an apocalyptic number.

1047928387 is a deficient number, since it is larger than the sum of its proper divisors (95266229).

1047928387 is an equidigital number, since it uses as much as digits as its factorization.

1047928387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95266228.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 1047928387 is about 32371.7220271026. The cubic root of 1047928387 is about 1015.7274786654.

The spelling of 1047928387 in words is "one billion, forty-seven million, nine hundred twenty-eight thousand, three hundred eighty-seven".