142313989 has 2 divisors, whose sum is σ = 142313990. Its totient is φ = 142313988.

The previous prime is 142313939. The next prime is 142313999. The reversal of 142313989 is 989313241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106708900 + 35605089 = 10330^2 + 5967^2 .

It is a cyclic number.

It is not a de Polignac number, because 142313989 - 2⁷ = 142313861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142313939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71156994 + 71156995.

It is an arithmetic number, because the mean of its divisors is an integer number (71156995).

Almost surely, 2^142313989 is an apocalyptic number.

It is an amenable number.

142313989 is a deficient number, since it is larger than the sum of its proper divisors (1).

142313989 is an equidigital number, since it uses as much as digits as its factorization.

142313989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 142313989 is about 11929.5426986955. The cubic root of 142313989 is about 522.0945951398.

The spelling of 142313989 in words is "one hundred forty-two million, three hundred thirteen thousand, nine hundred eighty-nine".