87289633 has 2 divisors, whose sum is σ = 87289634. Its totient is φ = 87289632.

The previous prime is 87289619. The next prime is 87289639. The reversal of 87289633 is 33698278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67371264 + 19918369 = 8208^2 + 4463^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87289633 is a prime.

It is not a weakly prime, because it can be changed into another prime (87289639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43644816 + 43644817.

It is an arithmetic number, because the mean of its divisors is an integer number (43644817).

Almost surely, 2^87289633 is an apocalyptic number.

It is an amenable number.

87289633 is a deficient number, since it is larger than the sum of its proper divisors (1).

87289633 is an equidigital number, since it uses as much as digits as its factorization.

87289633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The square root of 87289633 is about 9342.8921111185. The cubic root of 87289633 is about 443.5959330787.

The spelling of 87289633 in words is "eighty-seven million, two hundred eighty-nine thousand, six hundred thirty-three".