89999983 has 2 divisors, whose sum is σ = 89999984. Its totient is φ = 89999982.

The previous prime is 89999981. The next prime is 89999999. The reversal of 89999983 is 38999998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89999983 - 2¹ = 89999981 is a prime.

Together with 89999981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89999981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44999991 + 44999992.

It is an arithmetic number, because the mean of its divisors is an integer number (44999992).

Almost surely, 2^89999983 is an apocalyptic number.

89999983 is a deficient number, since it is larger than the sum of its proper divisors (1).

89999983 is an equidigital number, since it uses as much as digits as its factorization.

89999983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11337408, while the sum is 64.

The square root of 89999983 is about 9486.8320845264. The cubic root of 89999983 is about 448.1404464395.

The spelling of 89999983 in words is "eighty-nine million, nine hundred ninety-nine thousand, nine hundred eighty-three".