99142889 has 2 divisors, whose sum is σ = 99142890. Its totient is φ = 99142888.

The previous prime is 99142877. The next prime is 99142891. The reversal of 99142889 is 98824199.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93760489 + 5382400 = 9683^2 + 2320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99142889 is a prime.

Together with 99142891, 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 (99142859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49571444 + 49571445.

It is an arithmetic number, because the mean of its divisors is an integer number (49571445).

Almost surely, 2^99142889 is an apocalyptic number.

It is an amenable number.

99142889 is a deficient number, since it is larger than the sum of its proper divisors (1).

99142889 is an equidigital number, since it uses as much as digits as its factorization.

99142889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 50.

The square root of 99142889 is about 9957.0522244287. The cubic root of 99142889 is about 462.8289574971.

The spelling of 99142889 in words is "ninety-nine million, one hundred forty-two thousand, eight hundred eighty-nine".