1087989903 has 48 divisors (see below), whose sum is σ = 2110058496. Its totient is φ = 521709120.

The previous prime is 1087989811. The next prime is 1087989941. The reversal of 1087989903 is 3099897801.

It is not a de Polignac number, because 1087989903 - 2¹⁴ = 1087973519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1087989903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087989703) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51375 + ... + 69392.

It is an arithmetic number, because the mean of its divisors is an integer number (43959552).

Almost surely, 2^1087989903 is an apocalyptic number.

1087989903 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1087989903 is a deficient number, since it is larger than the sum of its proper divisors (1022068593).

1087989903 is a wasteful number, since it uses less digits than its factorization.

1087989903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120804 (or 120801 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 1087989903 is about 32984.6919494483. The cubic root of 1087989903 is about 1028.5094546076.

The spelling of 1087989903 in words is "one billion, eighty-seven million, nine hundred eighty-nine thousand, nine hundred three".