87751111 has 24 divisors (see below), whose sum is σ = 108017280. Its totient is φ = 70963200.

The previous prime is 87751099. The next prime is 87751121. The reversal of 87751111 is 11115778.

It is not a de Polignac number, because 87751111 - 2⁷ = 87750983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87751121) 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 in 23 ways as a sum of consecutive naturals, for example, 61575 + ... + 62983.

It is an arithmetic number, because the mean of its divisors is an integer number (4500720).

Almost surely, 2^87751111 is an apocalyptic number.

87751111 is a deficient number, since it is larger than the sum of its proper divisors (20266169).

87751111 is a wasteful number, since it uses less digits than its factorization.

87751111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495 (or 1488 counting only the distinct ones).

The product of its digits is 1960, while the sum is 31.

The square root of 87751111 is about 9367.5562982029. The cubic root of 87751111 is about 444.3762856567.

Adding to 87751111 its reverse (11115778), we get a palindrome (98866889).

The spelling of 87751111 in words is "eighty-seven million, seven hundred fifty-one thousand, one hundred eleven".