142773509 has 2 divisors, whose sum is σ = 142773510. Its totient is φ = 142773508.

The previous prime is 142773437. The next prime is 142773511. The reversal of 142773509 is 905377241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141729025 + 1044484 = 11905^2 + 1022^2 .

It is a cyclic number.

It is not a de Polignac number, because 142773509 - 2¹² = 142769413 is a prime.

Together with 142773511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142073509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71386754 + 71386755.

It is an arithmetic number, because the mean of its divisors is an integer number (71386755).

Almost surely, 2^142773509 is an apocalyptic number.

It is an amenable number.

142773509 is a deficient number, since it is larger than the sum of its proper divisors (1).

142773509 is an equidigital number, since it uses as much as digits as its factorization.

142773509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 142773509 is about 11948.7869258766. The cubic root of 142773509 is about 522.6559247103.

The spelling of 142773509 in words is "one hundred forty-two million, seven hundred seventy-three thousand, five hundred nine".