142487993 has 2 divisors, whose sum is σ = 142487994. Its totient is φ = 142487992.

The previous prime is 142487971. The next prime is 142488001. The reversal of 142487993 is 399784241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134490409 + 7997584 = 11597^2 + 2828^2 .

It is a cyclic number.

It is not a de Polignac number, because 142487993 - 2¹⁰ = 142486969 is a prime.

It is not a weakly prime, because it can be changed into another prime (142487963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71243996 + 71243997.

It is an arithmetic number, because the mean of its divisors is an integer number (71243997).

Almost surely, 2^142487993 is an apocalyptic number.

It is an amenable number.

142487993 is a deficient number, since it is larger than the sum of its proper divisors (1).

142487993 is an equidigital number, since it uses as much as digits as its factorization.

142487993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 142487993 is about 11936.8334578313. The cubic root of 142487993 is about 522.3072927773.

The spelling of 142487993 in words is "one hundred forty-two million, four hundred eighty-seven thousand, nine hundred ninety-three".