142819997 has 2 divisors, whose sum is σ = 142819998. Its totient is φ = 142819996.

The previous prime is 142819973. The next prime is 142820023. The reversal of 142819997 is 799918241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77193796 + 65626201 = 8786^2 + 8101^2 .

It is a cyclic number.

It is not a de Polignac number, because 142819997 - 2¹⁴ = 142803613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142819967) 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, 71409998 + 71409999.

It is an arithmetic number, because the mean of its divisors is an integer number (71409999).

Almost surely, 2^142819997 is an apocalyptic number.

It is an amenable number.

142819997 is a deficient number, since it is larger than the sum of its proper divisors (1).

142819997 is an equidigital number, since it uses as much as digits as its factorization.

142819997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 50.

The square root of 142819997 is about 11950.7320696265. The cubic root of 142819997 is about 522.7126452980.

The spelling of 142819997 in words is "one hundred forty-two million, eight hundred nineteen thousand, nine hundred ninety-seven".