88775521 has 4 divisors (see below), whose sum is σ = 90840112. Its totient is φ = 86710932.

The previous prime is 88775509. The next prime is 88775549. The reversal of 88775521 is 12557788.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 88775521 - 2¹⁷ = 88644449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 2064547 = 88775521 / (8 + 8 + 7 + 7 + 5 + 5 + 2 + 1).

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (88775021) 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 in 3 ways as a sum of consecutive naturals, for example, 1032231 + ... + 1032316.

It is an arithmetic number, because the mean of its divisors is an integer number (22710028).

Almost surely, 2^88775521 is an apocalyptic number.

It is an amenable number.

88775521 is a deficient number, since it is larger than the sum of its proper divisors (2064591).

88775521 is a wasteful number, since it uses less digits than its factorization.

88775521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064590.

The product of its digits is 156800, while the sum is 43.

The square root of 88775521 is about 9422.0762573862. The cubic root of 88775521 is about 446.0988221701.

The spelling of 88775521 in words is "eighty-eight million, seven hundred seventy-five thousand, five hundred twenty-one".