87935913 has 24 divisors (see below), whose sum is σ = 137104968. Its totient is φ = 53989632.

The previous prime is 87935909. The next prime is 87935929. The reversal of 87935913 is 31953978.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31505769 + 56430144 = 5613^2 + 7512^2 .

It is not a de Polignac number, because 87935913 - 2² = 87935909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87935963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99831 + ... + 100707.

It is an arithmetic number, because the mean of its divisors is an integer number (5712707).

Almost surely, 2^87935913 is an apocalyptic number.

It is an amenable number.

87935913 is a deficient number, since it is larger than the sum of its proper divisors (49169055).

87935913 is a wasteful number, since it uses less digits than its factorization.

87935913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753 (or 1750 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 87935913 is about 9377.4150489354. The cubic root of 87935913 is about 444.6880159735.

It can be divided in two parts, 8793 and 5913, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 87935913 in words is "eighty-seven million, nine hundred thirty-five thousand, nine hundred thirteen".