88722509 has 2 divisors, whose sum is σ = 88722510. Its totient is φ = 88722508.

The previous prime is 88722503. The next prime is 88722547. The reversal of 88722509 is 90522788.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69388900 + 19333609 = 8330^2 + 4397^2 .

It is a cyclic number.

It is not a de Polignac number, because 88722509 - 2²⁰ = 87673933 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88722503) 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, 44361254 + 44361255.

It is an arithmetic number, because the mean of its divisors is an integer number (44361255).

Almost surely, 2^88722509 is an apocalyptic number.

It is an amenable number.

88722509 is a deficient number, since it is larger than the sum of its proper divisors (1).

88722509 is an equidigital number, since it uses as much as digits as its factorization.

88722509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 88722509 is about 9419.2626569175. The cubic root of 88722509 is about 446.0100090255.

The spelling of 88722509 in words is "eighty-eight million, seven hundred twenty-two thousand, five hundred nine".