142847609 has 2 divisors, whose sum is σ = 142847610. Its totient is φ = 142847608.

The previous prime is 142847531. The next prime is 142847611. The reversal of 142847609 is 906748241.

142847609 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., 135024400 + 7823209 = 11620^2 + 2797^2 .

It is a cyclic number.

It is not a de Polignac number, because 142847609 - 2²⁴ = 126070393 is a prime.

It is a Sophie Germain prime.

Together with 142847611, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (142847629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71423804 + 71423805.

It is an arithmetic number, because the mean of its divisors is an integer number (71423805).

Almost surely, 2^142847609 is an apocalyptic number.

It is an amenable number.

142847609 is a deficient number, since it is larger than the sum of its proper divisors (1).

142847609 is an equidigital number, since it uses as much as digits as its factorization.

142847609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 142847609 is about 11951.8872568310. The cubic root of 142847609 is about 522.7463292167.

The spelling of 142847609 in words is "one hundred forty-two million, eight hundred forty-seven thousand, six hundred nine".