142971778492897 has 2 divisors, whose sum is σ = 142971778492898. Its totient is φ = 142971778492896.

The previous prime is 142971778492841. The next prime is 142971778492901. The reversal of 142971778492897 is 798294877179241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108367454580961 + 34604323911936 = 10409969^2 + 5882544^2 .

It is a cyclic number.

It is not a de Polignac number, because 142971778492897 - 2⁷ = 142971778492769 is a prime.

It is not a weakly prime, because it can be changed into another prime (142971778492097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71485889246448 + 71485889246449.

It is an arithmetic number, because the mean of its divisors is an integer number (71485889246449).

Almost surely, 2^{142971778492897} is an apocalyptic number.

It is an amenable number.

142971778492897 is a deficient number, since it is larger than the sum of its proper divisors (1).

142971778492897 is an equidigital number, since it uses as much as digits as its factorization.

142971778492897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7169347584, while the sum is 85.

The spelling of 142971778492897 in words is "one hundred forty-two trillion, nine hundred seventy-one billion, seven hundred seventy-eight million, four hundred ninety-two thousand, eight hundred ninety-seven".