88905581 has 2 divisors, whose sum is σ = 88905582. Its totient is φ = 88905580.

The previous prime is 88905569. The next prime is 88905587. The reversal of 88905581 is 18550988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64561225 + 24344356 = 8035^2 + 4934^2 .

It is a cyclic number.

It is not a de Polignac number, because 88905581 - 2¹⁸ = 88643437 is a prime.

It is a super-2 number, since 2×88905581² = 15808404665895122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88905587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44452790 + 44452791.

It is an arithmetic number, because the mean of its divisors is an integer number (44452791).

Almost surely, 2^88905581 is an apocalyptic number.

It is an amenable number.

88905581 is a deficient number, since it is larger than the sum of its proper divisors (1).

88905581 is an equidigital number, since it uses as much as digits as its factorization.

88905581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 44.

The square root of 88905581 is about 9428.9756071378. The cubic root of 88905581 is about 446.3165672626.

The spelling of 88905581 in words is "eighty-eight million, nine hundred five thousand, five hundred eighty-one".