89240513 has 2 divisors, whose sum is σ = 89240514. Its totient is φ = 89240512.

The previous prime is 89240491. The next prime is 89240563. The reversal of 89240513 is 31504298.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87759424 + 1481089 = 9368^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 89240513 - 2⁸ = 89240257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 89240513.

It is not a weakly prime, because it can be changed into another prime (89240563) 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, 44620256 + 44620257.

It is an arithmetic number, because the mean of its divisors is an integer number (44620257).

Almost surely, 2^89240513 is an apocalyptic number.

It is an amenable number.

89240513 is a deficient number, since it is larger than the sum of its proper divisors (1).

89240513 is an equidigital number, since it uses as much as digits as its factorization.

89240513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 89240513 is about 9446.7196952170. The cubic root of 89240513 is about 446.8763310505.

The spelling of 89240513 in words is "eighty-nine million, two hundred forty thousand, five hundred thirteen".