87578233 has 4 divisors (see below), whose sum is σ = 87605620. Its totient is φ = 87550848.

The previous prime is 87578221. The next prime is 87578251. The reversal of 87578233 is 33287578.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4549689 + 83028544 = 2133^2 + 9112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87578233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87578233.

It is not an unprimeable number, because it can be changed into a prime (87578213) 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, 8148 + ... + 15541.

It is an arithmetic number, because the mean of its divisors is an integer number (21901405).

Almost surely, 2^87578233 is an apocalyptic number.

It is an amenable number.

87578233 is a deficient number, since it is larger than the sum of its proper divisors (27387).

87578233 is a wasteful number, since it uses less digits than its factorization.

87578233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27386.

The product of its digits is 282240, while the sum is 43.

The square root of 87578233 is about 9358.3242623880. The cubic root of 87578233 is about 444.0842726843.

The spelling of 87578233 in words is "eighty-seven million, five hundred seventy-eight thousand, two hundred thirty-three".