142999867 has 2 divisors, whose sum is σ = 142999868. Its totient is φ = 142999866.

The previous prime is 142999861. The next prime is 142999889. The reversal of 142999867 is 768999241.

It is a weak prime.

It is an emirp because it is prime and its reverse (768999241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142999867 - 2³ = 142999859 is a prime.

It is not a weakly prime, because it can be changed into another prime (142999861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71499933 + 71499934.

It is an arithmetic number, because the mean of its divisors is an integer number (71499934).

Almost surely, 2^142999867 is an apocalyptic number.

142999867 is a deficient number, since it is larger than the sum of its proper divisors (1).

142999867 is an equidigital number, since it uses as much as digits as its factorization.

142999867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 55.

The square root of 142999867 is about 11958.2551820907. The cubic root of 142999867 is about 522.9319910544.

The spelling of 142999867 in words is "one hundred forty-two million, nine hundred ninety-nine thousand, eight hundred sixty-seven".