2897657923729 has 2 divisors, whose sum is σ = 2897657923730.
Its totient is φ = 2897657923728.
The previous prime is 2897657923723. The next prime is 2897657923733. The reversal of 2897657923729 is 9273297567982.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 1475136560704 + 1422521363025 = 1214552^2 + 1192695^2
It is a cyclic number.
It is not a de Polignac number, because 2897657923729 - 229 = 2897121052817 is a prime.
It is not a weakly prime, because it can be changed into another prime (2897657923723) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1448828961864 + 1448828961865.
It is an arithmetic number, because the mean of its divisors is an integer number (1448828961865).
Almost surely, 22897657923729 is an apocalyptic number.
It is an amenable number.
2897657923729 is a deficient number, since it is larger than the sum of its proper divisors (1).
2897657923729 is an equidigital number, since it uses as much as digits as its factorization.
2897657923729 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1440270720, while the sum is 76.
The spelling of 2897657923729 in words is "two trillion, eight hundred ninety-seven billion, six hundred fifty-seven million, nine hundred twenty-three thousand, seven hundred twenty-nine".