142323109 has 2 divisors, whose sum is σ = 142323110. Its totient is φ = 142323108.

The previous prime is 142323101. The next prime is 142323119. The reversal of 142323109 is 901323241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111830625 + 30492484 = 10575^2 + 5522^2 .

It is a cyclic number.

It is not a de Polignac number, because 142323109 - 2³ = 142323101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142323101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71161554 + 71161555.

It is an arithmetic number, because the mean of its divisors is an integer number (71161555).

Almost surely, 2^142323109 is an apocalyptic number.

It is an amenable number.

142323109 is a deficient number, since it is larger than the sum of its proper divisors (1).

142323109 is an equidigital number, since it uses as much as digits as its factorization.

142323109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 142323109 is about 11929.9249368971. The cubic root of 142323109 is about 522.1057474775.

The spelling of 142323109 in words is "one hundred forty-two million, three hundred twenty-three thousand, one hundred nine".