87216433 has 2 divisors, whose sum is σ = 87216434. Its totient is φ = 87216432.

The previous prime is 87216419. The next prime is 87216439. The reversal of 87216433 is 33461278.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87179569 + 36864 = 9337^2 + 192^2 .

It is a cyclic number.

It is not a de Polignac number, because 87216433 - 2⁵ = 87216401 is a prime.

It is not a weakly prime, because it can be changed into another prime (87216439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43608216 + 43608217.

It is an arithmetic number, because the mean of its divisors is an integer number (43608217).

Almost surely, 2^87216433 is an apocalyptic number.

It is an amenable number.

87216433 is a deficient number, since it is larger than the sum of its proper divisors (1).

87216433 is an equidigital number, since it uses as much as digits as its factorization.

87216433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 87216433 is about 9338.9738729691. The cubic root of 87216433 is about 443.4719003917.

The spelling of 87216433 in words is "eighty-seven million, two hundred sixteen thousand, four hundred thirty-three".