142069639 has 2 divisors, whose sum is σ = 142069640. Its totient is φ = 142069638.

The previous prime is 142069601. The next prime is 142069667. The reversal of 142069639 is 936960241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142069639 - 2⁷ = 142069511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142069139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71034819 + 71034820.

It is an arithmetic number, because the mean of its divisors is an integer number (71034820).

Almost surely, 2^142069639 is an apocalyptic number.

142069639 is a deficient number, since it is larger than the sum of its proper divisors (1).

142069639 is an equidigital number, since it uses as much as digits as its factorization.

142069639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 142069639 is about 11919.2969171843. The cubic root of 142069639 is about 521.7956156350.

The spelling of 142069639 in words is "one hundred forty-two million, sixty-nine thousand, six hundred thirty-nine".