89842387 has 2 divisors, whose sum is σ = 89842388. Its totient is φ = 89842386.

The previous prime is 89842343. The next prime is 89842391. The reversal of 89842387 is 78324898.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89842387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89842387.

It is not a weakly prime, because it can be changed into another prime (89842397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44921193 + 44921194.

It is an arithmetic number, because the mean of its divisors is an integer number (44921194).

Almost surely, 2^89842387 is an apocalyptic number.

89842387 is a deficient number, since it is larger than the sum of its proper divisors (1).

89842387 is an equidigital number, since it uses as much as digits as its factorization.

89842387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 49.

The square root of 89842387 is about 9478.5224059449. The cubic root of 89842387 is about 447.8787189639.

The spelling of 89842387 in words is "eighty-nine million, eight hundred forty-two thousand, three hundred eighty-seven".