89309999 has 2 divisors, whose sum is σ = 89310000. Its totient is φ = 89309998.

The previous prime is 89309981. The next prime is 89310017. The reversal of 89309999 is 99990398.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (89309981) and next prime (89310017).

It is a cyclic number.

It is not a de Polignac number, because 89309999 - 2¹² = 89305903 is a prime.

89309999 is a modest number, since divided by 9999 gives 8930 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89309699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44654999 + 44655000.

It is an arithmetic number, because the mean of its divisors is an integer number (44655000).

Almost surely, 2^89309999 is an apocalyptic number.

89309999 is a deficient number, since it is larger than the sum of its proper divisors (1).

89309999 is an equidigital number, since it uses as much as digits as its factorization.

89309999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1417176, while the sum is 56.

The square root of 89309999 is about 9450.3967641576. The cubic root of 89309999 is about 446.9922858333.

The spelling of 89309999 in words is "eighty-nine million, three hundred nine thousand, nine hundred ninety-nine".