99989459 has 2 divisors, whose sum is σ = 99989460. Its totient is φ = 99989458.

The previous prime is 99989423. The next prime is 99989479. The reversal of 99989459 is 95498999.

It is a strong prime.

It is an emirp because it is prime and its reverse (95498999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99989459 is a prime.

It is a super-2 number, since 2×99989459² = 19995783822225362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99989479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994729 + 49994730.

It is an arithmetic number, because the mean of its divisors is an integer number (49994730).

Almost surely, 2^99989459 is an apocalyptic number.

99989459 is a deficient number, since it is larger than the sum of its proper divisors (1).

99989459 is an equidigital number, since it uses as much as digits as its factorization.

99989459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9447840, while the sum is 62.

The square root of 99989459 is about 9999.4729361102. The cubic root of 99989459 is about 464.1425737922.

The spelling of 99989459 in words is "ninety-nine million, nine hundred eighty-nine thousand, four hundred fifty-nine".