99142289 has 2 divisors, whose sum is σ = 99142290. Its totient is φ = 99142288.

The previous prime is 99142279. The next prime is 99142291. The reversal of 99142289 is 98224199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67782289 + 31360000 = 8233^2 + 5600^2 .

It is a cyclic number.

It is not a de Polignac number, because 99142289 - 2⁸ = 99142033 is a prime.

Together with 99142291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99142279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49571144 + 49571145.

It is an arithmetic number, because the mean of its divisors is an integer number (49571145).

Almost surely, 2^99142289 is an apocalyptic number.

It is an amenable number.

99142289 is a deficient number, since it is larger than the sum of its proper divisors (1).

99142289 is an equidigital number, since it uses as much as digits as its factorization.

99142289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 99142289 is about 9957.0220949840. The cubic root of 99142289 is about 462.8280238348.

The spelling of 99142289 in words is "ninety-nine million, one hundred forty-two thousand, two hundred eighty-nine".