142971563897 has 2 divisors, whose sum is σ = 142971563898. Its totient is φ = 142971563896.

The previous prime is 142971563837. The next prime is 142971563909. The reversal of 142971563897 is 798365179241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136651472896 + 6320091001 = 369664^2 + 79499^2 .

It is a cyclic number.

It is not a de Polignac number, because 142971563897 - 2¹⁴ = 142971547513 is a prime.

It is not a weakly prime, because it can be changed into another prime (142971563837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71485781948 + 71485781949.

It is an arithmetic number, because the mean of its divisors is an integer number (71485781949).

Almost surely, 2^142971563897 is an apocalyptic number.

It is an amenable number.

142971563897 is a deficient number, since it is larger than the sum of its proper divisors (1).

142971563897 is an equidigital number, since it uses as much as digits as its factorization.

142971563897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 62.

The spelling of 142971563897 in words is "one hundred forty-two billion, nine hundred seventy-one million, five hundred sixty-three thousand, eight hundred ninety-seven".