803561987 has 2 divisors, whose sum is σ = 803561988. Its totient is φ = 803561986.

The previous prime is 803561951. The next prime is 803561999. The reversal of 803561987 is 789165308.

It is a happy number.

803561987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 803561987 - 2¹⁰ = 803560963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (803561947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401780993 + 401780994.

It is an arithmetic number, because the mean of its divisors is an integer number (401780994).

Almost surely, 2^803561987 is an apocalyptic number.

803561987 is a deficient number, since it is larger than the sum of its proper divisors (1).

803561987 is an equidigital number, since it uses as much as digits as its factorization.

803561987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 803561987 is about 28347.1689415363. The cubic root of 803561987 is about 929.6935001851.

The spelling of 803561987 in words is "eight hundred three million, five hundred sixty-one thousand, nine hundred eighty-seven".