142911893 has 2 divisors, whose sum is σ = 142911894. Its totient is φ = 142911892.

The previous prime is 142911889. The next prime is 142911941. The reversal of 142911893 is 398119241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79263409 + 63648484 = 8903^2 + 7978^2 .

It is a cyclic number.

It is not a de Polignac number, because 142911893 - 2² = 142911889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142911803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71455946 + 71455947.

It is an arithmetic number, because the mean of its divisors is an integer number (71455947).

Almost surely, 2^142911893 is an apocalyptic number.

It is an amenable number.

142911893 is a deficient number, since it is larger than the sum of its proper divisors (1).

142911893 is an equidigital number, since it uses as much as digits as its factorization.

142911893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 142911893 is about 11954.5762367388. The cubic root of 142911893 is about 522.8247325485.

The spelling of 142911893 in words is "one hundred forty-two million, nine hundred eleven thousand, eight hundred ninety-three".