88816509 has 6 divisors (see below), whose sum is σ = 128290526. Its totient is φ = 59211000.

The previous prime is 88816487. The next prime is 88816523. The reversal of 88816509 is 90561888.

It can be written as a sum of positive squares in only one way, i.e., 71825625 + 16990884 = 8475^2 + 4122^2 .

It is not a de Polignac number, because 88816509 - 2¹⁶ = 88750973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88816529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4934242 + ... + 4934259.

Almost surely, 2^88816509 is an apocalyptic number.

It is an amenable number.

88816509 is a deficient number, since it is larger than the sum of its proper divisors (39474017).

88816509 is a wasteful number, since it uses less digits than its factorization.

88816509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9868507 (or 9868504 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 88816509 is about 9424.2511108310. The cubic root of 88816509 is about 446.1674667882.

The spelling of 88816509 in words is "eighty-eight million, eight hundred sixteen thousand, five hundred nine".