89409637 has 2 divisors, whose sum is σ = 89409638. Its totient is φ = 89409636.

The previous prime is 89409623. The next prime is 89409679. The reversal of 89409637 is 73690498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80174116 + 9235521 = 8954^2 + 3039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89409637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89409037) 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, 44704818 + 44704819.

It is an arithmetic number, because the mean of its divisors is an integer number (44704819).

Almost surely, 2^89409637 is an apocalyptic number.

It is an amenable number.

89409637 is a deficient number, since it is larger than the sum of its proper divisors (1).

89409637 is an equidigital number, since it uses as much as digits as its factorization.

89409637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 89409637 is about 9455.6669251830. Note that the first 3 decimals coincide. The cubic root of 89409637 is about 447.1584518674.

The spelling of 89409637 in words is "eighty-nine million, four hundred nine thousand, six hundred thirty-seven".