142999889 has 2 divisors, whose sum is σ = 142999890. Its totient is φ = 142999888.

The previous prime is 142999867. The next prime is 142999891. The reversal of 142999889 is 988999241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76038400 + 66961489 = 8720^2 + 8183^2 .

It is a cyclic number.

It is not a de Polignac number, because 142999889 - 2¹⁶ = 142934353 is a prime.

Together with 142999891, 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 (142999819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71499944 + 71499945.

It is an arithmetic number, because the mean of its divisors is an integer number (71499945).

Almost surely, 2^142999889 is an apocalyptic number.

It is an amenable number.

142999889 is a deficient number, since it is larger than the sum of its proper divisors (1).

142999889 is an equidigital number, since it uses as much as digits as its factorization.

142999889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 59.

The square root of 142999889 is about 11958.2561019573. The cubic root of 142999889 is about 522.9320178714.

The spelling of 142999889 in words is "one hundred forty-two million, nine hundred ninety-nine thousand, eight hundred eighty-nine".