87633173 has 2 divisors, whose sum is σ = 87633174. Its totient is φ = 87633172.

The previous prime is 87633167. The next prime is 87633179. The reversal of 87633173 is 37133678.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (87633167) and next prime (87633179).

It can be written as a sum of positive squares in only one way, i.e., 87572164 + 61009 = 9358^2 + 247^2 .

It is a cyclic number.

It is not a de Polignac number, because 87633173 - 2⁸ = 87632917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87633179) 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 as a sum of consecutive naturals, namely, 43816586 + 43816587.

It is an arithmetic number, because the mean of its divisors is an integer number (43816587).

Almost surely, 2^87633173 is an apocalyptic number.

It is an amenable number.

87633173 is a deficient number, since it is larger than the sum of its proper divisors (1).

87633173 is an equidigital number, since it uses as much as digits as its factorization.

87633173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 38.

The square root of 87633173 is about 9361.2591567588. The cubic root of 87633173 is about 444.1771149697.

The spelling of 87633173 in words is "eighty-seven million, six hundred thirty-three thousand, one hundred seventy-three".