87120833 has 4 divisors (see below), whose sum is σ = 91706160. Its totient is φ = 82535508.

The previous prime is 87120827. The next prime is 87120863. The reversal of 87120833 is 33802178.

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 87120833 - 2⁶ = 87120769 is a prime.

It is a super-2 number, since 2×87120833² = 15180079085227778, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87120833.

It is not an unprimeable number, because it can be changed into a prime (87120863) 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 3 ways as a sum of consecutive naturals, for example, 2292635 + ... + 2292672.

It is an arithmetic number, because the mean of its divisors is an integer number (22926540).

Almost surely, 2^87120833 is an apocalyptic number.

It is an amenable number.

87120833 is a deficient number, since it is larger than the sum of its proper divisors (4585327).

87120833 is a wasteful number, since it uses less digits than its factorization.

87120833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4585326.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 87120833 is about 9333.8541342792. The cubic root of 87120833 is about 443.3098077981.

The spelling of 87120833 in words is "eighty-seven million, one hundred twenty thousand, eight hundred thirty-three".