142843421997 has 10 divisors (see below), whose sum is σ = 213383383598. Its totient is φ = 95228947944.

The previous prime is 142843421983. The next prime is 142843422067. The reversal of 142843421997 is 799124348241.

142843421997 is a `hidden beast` number, since 1 + 4 + 284 + 342 + 19 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 135756139401 + 7087282596 = 368451^2 + 84186^2 .

It is not a de Polignac number, because 142843421997 - 2¹⁵ = 142843389229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142843421947) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 881749438 + ... + 881749599.

Almost surely, 2^142843421997 is an apocalyptic number.

It is an amenable number.

142843421997 is a deficient number, since it is larger than the sum of its proper divisors (70539961601).

142843421997 is an equidigital number, since it uses as much as digits as its factorization.

142843421997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763499049 (or 1763499040 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 142843421997 in words is "one hundred forty-two billion, eight hundred forty-three million, four hundred twenty-one thousand, nine hundred ninety-seven".