142718993 has 2 divisors, whose sum is σ = 142718994. Its totient is φ = 142718992.

The previous prime is 142718977. The next prime is 142718999. The reversal of 142718993 is 399817241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90763729 + 51955264 = 9527^2 + 7208^2 .

It is a cyclic number.

It is not a de Polignac number, because 142718993 - 2⁴ = 142718977 is a prime.

It is not a weakly prime, because it can be changed into another prime (142718999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71359496 + 71359497.

It is an arithmetic number, because the mean of its divisors is an integer number (71359497).

Almost surely, 2^142718993 is an apocalyptic number.

It is an amenable number.

142718993 is a deficient number, since it is larger than the sum of its proper divisors (1).

142718993 is an equidigital number, since it uses as much as digits as its factorization.

142718993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 142718993 is about 11946.5054723128. The cubic root of 142718993 is about 522.5893933724.

The spelling of 142718993 in words is "one hundred forty-two million, seven hundred eighteen thousand, nine hundred ninety-three".