142803809 has 2 divisors, whose sum is σ = 142803810. Its totient is φ = 142803808.

The previous prime is 142803769. The next prime is 142803821. The reversal of 142803809 is 908308241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142086400 + 717409 = 11920^2 + 847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142803809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142803839) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71401904 + 71401905.

It is an arithmetic number, because the mean of its divisors is an integer number (71401905).

Almost surely, 2^142803809 is an apocalyptic number.

It is an amenable number.

142803809 is a deficient number, since it is larger than the sum of its proper divisors (1).

142803809 is an equidigital number, since it uses as much as digits as its factorization.

142803809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 142803809 is about 11950.0547697490. The cubic root of 142803809 is about 522.6928955146.

The spelling of 142803809 in words is "one hundred forty-two million, eight hundred three thousand, eight hundred nine".