89904439 has 2 divisors, whose sum is σ = 89904440. Its totient is φ = 89904438.

The previous prime is 89904421. The next prime is 89904461. The reversal of 89904439 is 93440998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89904439 - 2¹⁵ = 89871671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89904499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44952219 + 44952220.

It is an arithmetic number, because the mean of its divisors is an integer number (44952220).

Almost surely, 2^89904439 is an apocalyptic number.

89904439 is a deficient number, since it is larger than the sum of its proper divisors (1).

89904439 is an equidigital number, since it uses as much as digits as its factorization.

89904439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 89904439 is about 9481.7951359434. The cubic root of 89904439 is about 447.9818082935.

The spelling of 89904439 in words is "eighty-nine million, nine hundred four thousand, four hundred thirty-nine".