987908783 has 2 divisors, whose sum is σ = 987908784. Its totient is φ = 987908782.

The previous prime is 987908773. The next prime is 987908807. The reversal of 987908783 is 387809789.

It is a weak prime.

It is an emirp because it is prime and its reverse (387809789) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987908783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987908773) 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 as a sum of consecutive naturals, namely, 493954391 + 493954392.

It is an arithmetic number, because the mean of its divisors is an integer number (493954392).

Almost surely, 2^987908783 is an apocalyptic number.

987908783 is a deficient number, since it is larger than the sum of its proper divisors (1).

987908783 is an equidigital number, since it uses as much as digits as its factorization.

987908783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The square root of 987908783 is about 31431.0162578304. The cubic root of 987908783 is about 995.9532401584.

The spelling of 987908783 in words is "nine hundred eighty-seven million, nine hundred eight thousand, seven hundred eighty-three".