987898811 has 2 divisors, whose sum is σ = 987898812. Its totient is φ = 987898810.

The previous prime is 987898789. The next prime is 987898861. The reversal of 987898811 is 118898789.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987898811 is a prime.

It is not a weakly prime, because it can be changed into another prime (987898861) 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, 493949405 + 493949406.

It is an arithmetic number, because the mean of its divisors is an integer number (493949406).

Almost surely, 2^987898811 is an apocalyptic number.

987898811 is a deficient number, since it is larger than the sum of its proper divisors (1).

987898811 is an equidigital number, since it uses as much as digits as its factorization.

987898811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 59.

The square root of 987898811 is about 31430.8576243156. The cubic root of 987898811 is about 995.9498890801.

The spelling of 987898811 in words is "nine hundred eighty-seven million, eight hundred ninety-eight thousand, eight hundred eleven".