87798117 has 16 divisors (see below), whose sum is σ = 128079360. Its totient is φ = 53055600.

The previous prime is 87798091. The next prime is 87798119. The reversal of 87798117 is 71189778.

It is not a de Polignac number, because 87798117 - 2⁷ = 87797989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87798119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8142 + ... + 15552.

It is an arithmetic number, because the mean of its divisors is an integer number (8004960).

Almost surely, 2^87798117 is an apocalyptic number.

It is an amenable number.

87798117 is a deficient number, since it is larger than the sum of its proper divisors (40281243).

87798117 is a wasteful number, since it uses less digits than its factorization.

87798117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7784.

The product of its digits is 197568, while the sum is 48.

The square root of 87798117 is about 9370.0649410770. The cubic root of 87798117 is about 444.4556184529.

The spelling of 87798117 in words is "eighty-seven million, seven hundred ninety-eight thousand, one hundred seventeen".