87378833 has 4 divisors (see below), whose sum is σ = 87408948. Its totient is φ = 87348720.

The previous prime is 87378803. The next prime is 87378839. The reversal of 87378833 is 33887378.

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 47789569 + 39589264 = 6913^2 + 6292^2 .

It is a cyclic number.

It is not a de Polignac number, because 87378833 - 2¹² = 87374737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87378839) 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, 10178 + ... + 16683.

It is an arithmetic number, because the mean of its divisors is an integer number (21852237).

Almost surely, 2^87378833 is an apocalyptic number.

It is an amenable number.

87378833 is a deficient number, since it is larger than the sum of its proper divisors (30115).

87378833 is a wasteful number, since it uses less digits than its factorization.

87378833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30114.

The product of its digits is 677376, while the sum is 47.

The square root of 87378833 is about 9347.6645746411. The cubic root of 87378833 is about 443.7469830384.

The spelling of 87378833 in words is "eighty-seven million, three hundred seventy-eight thousand, eight hundred thirty-three".