142019393 has 2 divisors, whose sum is σ = 142019394. Its totient is φ = 142019392.

The previous prime is 142019369. The next prime is 142019399. The reversal of 142019393 is 393910241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86248369 + 55771024 = 9287^2 + 7468^2 .

It is a cyclic number.

It is not a de Polignac number, because 142019393 - 2¹⁴ = 142003009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (142019399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71009696 + 71009697.

It is an arithmetic number, because the mean of its divisors is an integer number (71009697).

Almost surely, 2^142019393 is an apocalyptic number.

It is an amenable number.

142019393 is a deficient number, since it is larger than the sum of its proper divisors (1).

142019393 is an equidigital number, since it uses as much as digits as its factorization.

142019393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 142019393 is about 11917.1889722367. The cubic root of 142019393 is about 521.7340936139.

The spelling of 142019393 in words is "one hundred forty-two million, nineteen thousand, three hundred ninety-three".