99989389 has 2 divisors, whose sum is σ = 99989390. Its totient is φ = 99989388.

The previous prime is 99989369. The next prime is 99989423. The reversal of 99989389 is 98398999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99102025 + 887364 = 9955^2 + 942^2 .

It is a cyclic number.

It is not a de Polignac number, because 99989389 - 2⁷ = 99989261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99989389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99989339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994694 + 49994695.

It is an arithmetic number, because the mean of its divisors is an integer number (49994695).

Almost surely, 2^99989389 is an apocalyptic number.

It is an amenable number.

99989389 is a deficient number, since it is larger than the sum of its proper divisors (1).

99989389 is an equidigital number, since it uses as much as digits as its factorization.

99989389 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 99989389 is about 9999.4694359251. The cubic root of 99989389 is about 464.1424654809.

The spelling of 99989389 in words is "ninety-nine million, nine hundred eighty-nine thousand, three hundred eighty-nine".