87719775 has 48 divisors (see below), whose sum is σ = 170405760. Its totient is φ = 39254400.

The previous prime is 87719773. The next prime is 87719791. The reversal of 87719775 is 57791778.

It is a happy number.

It is not a de Polignac number, because 87719775 - 2¹ = 87719773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87719771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6636 + ... + 14814.

It is an arithmetic number, because the mean of its divisors is an integer number (3550120).

Almost surely, 2^87719775 is an apocalyptic number.

87719775 is a deficient number, since it is larger than the sum of its proper divisors (82685985).

87719775 is a wasteful number, since it uses less digits than its factorization.

87719775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216 (or 8211 counting only the distinct ones).

The product of its digits is 864360, while the sum is 51.

The square root of 87719775 is about 9365.8835675018. The cubic root of 87719775 is about 444.3233836364.

The spelling of 87719775 in words is "eighty-seven million, seven hundred nineteen thousand, seven hundred seventy-five".