142986869 has 2 divisors, whose sum is σ = 142986870. Its totient is φ = 142986868.

The previous prime is 142986853. The next prime is 142986871. The reversal of 142986869 is 968689241.

It is a happy number.

142986869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136585969 + 6400900 = 11687^2 + 2530^2 .

It is a cyclic number.

It is not a de Polignac number, because 142986869 - 2⁴ = 142986853 is a prime.

It is a super-2 number, since 2×142986869² = 40890489412846322, which contains 22 as substring.

Together with 142986871, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142986869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142986889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71493434 + 71493435.

It is an arithmetic number, because the mean of its divisors is an integer number (71493435).

Almost surely, 2^142986869 is an apocalyptic number.

It is an amenable number.

142986869 is a deficient number, since it is larger than the sum of its proper divisors (1).

142986869 is an equidigital number, since it uses as much as digits as its factorization.

142986869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 53.

The square root of 142986869 is about 11957.7116958053. The cubic root of 142986869 is about 522.9161465735.

The spelling of 142986869 in words is "one hundred forty-two million, nine hundred eighty-six thousand, eight hundred sixty-nine".