1103128987 has 2 divisors, whose sum is σ = 1103128988. Its totient is φ = 1103128986.

The previous prime is 1103128979. The next prime is 1103129011. The reversal of 1103128987 is 7898213011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1103128987 - 2³ = 1103128979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1103128907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551564493 + 551564494.

It is an arithmetic number, because the mean of its divisors is an integer number (551564494).

Almost surely, 2^1103128987 is an apocalyptic number.

1103128987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103128987 is an equidigital number, since it uses as much as digits as its factorization.

1103128987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 1103128987 is about 33213.3856600016. The cubic root of 1103128987 is about 1033.2579740279.

The spelling of 1103128987 in words is "one billion, one hundred three million, one hundred twenty-eight thousand, nine hundred eighty-seven".