88447409 has 2 divisors, whose sum is σ = 88447410. Its totient is φ = 88447408.

The previous prime is 88447349. The next prime is 88447421. The reversal of 88447409 is 90474488.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47128225 + 41319184 = 6865^2 + 6428^2 .

It is a cyclic number.

It is not a de Polignac number, because 88447409 - 2⁸ = 88447153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 88447409.

It is not a weakly prime, because it can be changed into another prime (88447459) 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, 44223704 + 44223705.

It is an arithmetic number, because the mean of its divisors is an integer number (44223705).

Almost surely, 2^88447409 is an apocalyptic number.

It is an amenable number.

88447409 is a deficient number, since it is larger than the sum of its proper divisors (1).

88447409 is an equidigital number, since it uses as much as digits as its factorization.

88447409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 88447409 is about 9404.6482656184. The cubic root of 88447409 is about 445.5485538330.

The spelling of 88447409 in words is "eighty-eight million, four hundred forty-seven thousand, four hundred nine".