87192121 has 8 divisors (see below), whose sum is σ = 92118080. Its totient is φ = 82299888.

The previous prime is 87192109. The next prime is 87192137. The reversal of 87192121 is 12129178.

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

It is a cyclic number.

It is not a de Polignac number, because 87192121 - 2¹⁵ = 87159353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87192101) 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, 3021 + ... + 13546.

It is an arithmetic number, because the mean of its divisors is an integer number (11514760).

Almost surely, 2^87192121 is an apocalyptic number.

It is an amenable number.

87192121 is a deficient number, since it is larger than the sum of its proper divisors (4925959).

87192121 is a wasteful number, since it uses less digits than its factorization.

87192121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16863.

The product of its digits is 2016, while the sum is 31.

The square root of 87192121 is about 9337.6721403142. The cubic root of 87192121 is about 443.4306899209.

The spelling of 87192121 in words is "eighty-seven million, one hundred ninety-two thousand, one hundred twenty-one".