87171233 has 2 divisors, whose sum is σ = 87171234. Its totient is φ = 87171232.

The previous prime is 87171179. The next prime is 87171239. The reversal of 87171233 is 33217178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80856064 + 6315169 = 8992^2 + 2513^2 .

It is a cyclic number.

It is not a de Polignac number, because 87171233 - 2¹² = 87167137 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87171233.

It is not a weakly prime, because it can be changed into another prime (87171239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43585616 + 43585617.

It is an arithmetic number, because the mean of its divisors is an integer number (43585617).

Almost surely, 2^87171233 is an apocalyptic number.

It is an amenable number.

87171233 is a deficient number, since it is larger than the sum of its proper divisors (1).

87171233 is an equidigital number, since it uses as much as digits as its factorization.

87171233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 32.

The square root of 87171233 is about 9336.5535932698. The cubic root of 87171233 is about 443.3952772410.

The spelling of 87171233 in words is "eighty-seven million, one hundred seventy-one thousand, two hundred thirty-three".