89799989 has 2 divisors, whose sum is σ = 89799990. Its totient is φ = 89799988.

The previous prime is 89799961. The next prime is 89800063. The reversal of 89799989 is 98999798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48094225 + 41705764 = 6935^2 + 6458^2 .

It is a cyclic number.

It is not a de Polignac number, because 89799989 - 2¹⁶ = 89734453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89799949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44899994 + 44899995.

It is an arithmetic number, because the mean of its divisors is an integer number (44899995).

Almost surely, 2^89799989 is an apocalyptic number.

It is an amenable number.

89799989 is a deficient number, since it is larger than the sum of its proper divisors (1).

89799989 is an equidigital number, since it uses as much as digits as its factorization.

89799989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26453952, while the sum is 68.

The square root of 89799989 is about 9476.2856119895. The cubic root of 89799989 is about 447.8082542666.

The spelling of 89799989 in words is "eighty-nine million, seven hundred ninety-nine thousand, nine hundred eighty-nine".