89445409 has 2 divisors, whose sum is σ = 89445410. Its totient is φ = 89445408.

The previous prime is 89445401. The next prime is 89445427. The reversal of 89445409 is 90454498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69222400 + 20223009 = 8320^2 + 4497^2 .

It is a cyclic number.

It is not a de Polignac number, because 89445409 - 2³ = 89445401 is a prime.

It is not a weakly prime, because it can be changed into another prime (89445401) 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, 44722704 + 44722705.

It is an arithmetic number, because the mean of its divisors is an integer number (44722705).

Almost surely, 2^89445409 is an apocalyptic number.

It is an amenable number.

89445409 is a deficient number, since it is larger than the sum of its proper divisors (1).

89445409 is an equidigital number, since it uses as much as digits as its factorization.

89445409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 89445409 is about 9457.5583001111. The cubic root of 89445409 is about 447.2180786217.

The spelling of 89445409 in words is "eighty-nine million, four hundred forty-five thousand, four hundred nine".