87055993 has 2 divisors, whose sum is σ = 87055994. Its totient is φ = 87055992.

The previous prime is 87055987. The next prime is 87056017. The reversal of 87055993 is 39955078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84584809 + 2471184 = 9197^2 + 1572^2 .

It is a cyclic number.

It is not a de Polignac number, because 87055993 - 2⁹ = 87055481 is a prime.

It is not a weakly prime, because it can be changed into another prime (87050993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43527996 + 43527997.

It is an arithmetic number, because the mean of its divisors is an integer number (43527997).

Almost surely, 2^87055993 is an apocalyptic number.

It is an amenable number.

87055993 is a deficient number, since it is larger than the sum of its proper divisors (1).

87055993 is an equidigital number, since it uses as much as digits as its factorization.

87055993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 87055993 is about 9330.3801101563. The cubic root of 87055993 is about 443.1998021852.

The spelling of 87055993 in words is "eighty-seven million, fifty-five thousand, nine hundred ninety-three".