87113121 has 8 divisors (see below), whose sum is σ = 121200960. Its totient is φ = 55550352.

The previous prime is 87113113. The next prime is 87113123. The reversal of 87113121 is 12131178.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87113121 - 2³ = 87113113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87113091 and 87113100.

It is not an unprimeable number, because it can be changed into a prime (87113123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631186 + ... + 631323.

It is an arithmetic number, because the mean of its divisors is an integer number (15150120).

Almost surely, 2^87113121 is an apocalyptic number.

It is an amenable number.

87113121 is a deficient number, since it is larger than the sum of its proper divisors (34087839).

87113121 is a wasteful number, since it uses less digits than its factorization.

87113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262535.

The product of its digits is 336, while the sum is 24.

The square root of 87113121 is about 9333.4410053313. The cubic root of 87113121 is about 443.2967267090.

Adding to 87113121 its reverse (12131178), we get a palindrome (99244299).

The spelling of 87113121 in words is "eighty-seven million, one hundred thirteen thousand, one hundred twenty-one".