142444789 has 2 divisors, whose sum is σ = 142444790. Its totient is φ = 142444788.

The previous prime is 142444763. The next prime is 142444823. The reversal of 142444789 is 987444241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88172100 + 54272689 = 9390^2 + 7367^2 .

It is a cyclic number.

It is not a de Polignac number, because 142444789 - 2⁷ = 142444661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142444889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71222394 + 71222395.

It is an arithmetic number, because the mean of its divisors is an integer number (71222395).

Almost surely, 2^142444789 is an apocalyptic number.

It is an amenable number.

142444789 is a deficient number, since it is larger than the sum of its proper divisors (1).

142444789 is an equidigital number, since it uses as much as digits as its factorization.

142444789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 43.

The square root of 142444789 is about 11935.0236279615. The cubic root of 142444789 is about 522.2544975793.

The spelling of 142444789 in words is "one hundred forty-two million, four hundred forty-four thousand, seven hundred eighty-nine".