87133091 has 2 divisors, whose sum is σ = 87133092. Its totient is φ = 87133090.

The previous prime is 87133073. The next prime is 87133099. The reversal of 87133091 is 19033178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87133091 - 2¹⁴ = 87116707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87133099) 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, 43566545 + 43566546.

It is an arithmetic number, because the mean of its divisors is an integer number (43566546).

Almost surely, 2^87133091 is an apocalyptic number.

87133091 is a deficient number, since it is larger than the sum of its proper divisors (1).

87133091 is an equidigital number, since it uses as much as digits as its factorization.

87133091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 87133091 is about 9334.5107531140. The cubic root of 87133091 is about 443.3305982206.

The spelling of 87133091 in words is "eighty-seven million, one hundred thirty-three thousand, ninety-one".