87798617 has 4 divisors (see below), whose sum is σ = 87884160. Its totient is φ = 87713076.

The previous prime is 87798587. The next prime is 87798619. The reversal of 87798617 is 71689778.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87798617 - 2⁶ = 87798553 is a prime.

It is a super-3 number, since 3×87798617³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87798619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41213 + ... + 43290.

It is an arithmetic number, because the mean of its divisors is an integer number (21971040).

Almost surely, 2^87798617 is an apocalyptic number.

It is an amenable number.

87798617 is a deficient number, since it is larger than the sum of its proper divisors (85543).

87798617 is a wasteful number, since it uses less digits than its factorization.

87798617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85542.

The product of its digits is 1185408, while the sum is 53.

The square root of 87798617 is about 9370.0916217506. The cubic root of 87798617 is about 444.4564621588.

The spelling of 87798617 in words is "eighty-seven million, seven hundred ninety-eight thousand, six hundred seventeen".