2897121052817 has 2 divisors, whose sum is σ = 2897121052818.
Its totient is φ = 2897121052816.
The previous prime is 2897121052807. The next prime is 2897121052883. The reversal of 2897121052817 is 7182501217982.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1481773032961 + 1415348019856 = 1217281^2 + 1189684^2
It is a cyclic number.
It is not a de Polignac number, because 2897121052817 - 24 = 2897121052801 is a prime.
It is not a weakly prime, because it can be changed into another prime (2897121052807) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1448560526408 + 1448560526409.
It is an arithmetic number, because the mean of its divisors is an integer number (1448560526409).
Almost surely, 22897121052817 is an apocalyptic number.
It is an amenable number.
2897121052817 is a deficient number, since it is larger than the sum of its proper divisors (1).
2897121052817 is an equidigital number, since it uses as much as digits as its factorization.
2897121052817 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1128960, while the sum is 53.
The spelling of 2897121052817 in words is "two trillion, eight hundred ninety-seven billion, one hundred twenty-one million, fifty-two thousand, eight hundred seventeen".