88478009 has 2 divisors, whose sum is σ = 88478010. Its totient is φ = 88478008.

The previous prime is 88477981. The next prime is 88478011. The reversal of 88478009 is 90087488.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78712384 + 9765625 = 8872^2 + 3125^2 .

It is a cyclic number.

It is not a de Polignac number, because 88478009 - 2¹⁶ = 88412473 is a prime.

It is a Sophie Germain prime.

Together with 88478011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (88478029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44239004 + 44239005.

It is an arithmetic number, because the mean of its divisors is an integer number (44239005).

Almost surely, 2^88478009 is an apocalyptic number.

It is an amenable number.

88478009 is a deficient number, since it is larger than the sum of its proper divisors (1).

88478009 is an equidigital number, since it uses as much as digits as its factorization.

88478009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 88478009 is about 9406.2749800333. The cubic root of 88478009 is about 445.5999298010.

The spelling of 88478009 in words is "eighty-eight million, four hundred seventy-eight thousand, nine".