987757871 has 2 divisors, whose sum is σ = 987757872. Its totient is φ = 987757870.

The previous prime is 987757861. The next prime is 987757879. The reversal of 987757871 is 178757789.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 987757871 - 2¹⁴ = 987741487 is a prime.

It is a super-2 number, since 2×987757871² = 1951331223444905282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 987757871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987757879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493878935 + 493878936.

It is an arithmetic number, because the mean of its divisors is an integer number (493878936).

Almost surely, 2^987757871 is an apocalyptic number.

987757871 is a deficient number, since it is larger than the sum of its proper divisors (1).

987757871 is an equidigital number, since it uses as much as digits as its factorization.

987757871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6914880, while the sum is 59.

The square root of 987757871 is about 31428.6154801639. The cubic root of 987757871 is about 995.9025239547.

The spelling of 987757871 in words is "nine hundred eighty-seven million, seven hundred fifty-seven thousand, eight hundred seventy-one".