88530991 has 2 divisors, whose sum is σ = 88530992. Its totient is φ = 88530990.

The previous prime is 88530977. The next prime is 88531031. The reversal of 88530991 is 19903588.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 88530991 - 2⁹ = 88530479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88530941) 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, 44265495 + 44265496.

It is an arithmetic number, because the mean of its divisors is an integer number (44265496).

Almost surely, 2^88530991 is an apocalyptic number.

88530991 is a deficient number, since it is larger than the sum of its proper divisors (1).

88530991 is an equidigital number, since it uses as much as digits as its factorization.

88530991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 88530991 is about 9409.0908700044. The cubic root of 88530991 is about 445.6888560961.

The spelling of 88530991 in words is "eighty-eight million, five hundred thirty thousand, nine hundred ninety-one".