3897714278657 has 2 divisors, whose sum is σ = 3897714278658. Its totient is φ = 3897714278656.

The previous prime is 3897714278617. The next prime is 3897714278699. The reversal of 3897714278657 is 7568724177983.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2560508825281 + 1337205453376 = 1600159^2 + 1156376^2 .

It is a cyclic number.

It is not a de Polignac number, because 3897714278657 - 2⁸ = 3897714278401 is a prime.

It is not a weakly prime, because it can be changed into another prime (3897714278617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1948857139328 + 1948857139329.

It is an arithmetic number, because the mean of its divisors is an integer number (1948857139329).

Almost surely, 2^{3897714278657} is an apocalyptic number.

It is an amenable number.

3897714278657 is a deficient number, since it is larger than the sum of its proper divisors (1).

3897714278657 is an equidigital number, since it uses as much as digits as its factorization.

3897714278657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995742720, while the sum is 74.

The spelling of 3897714278657 in words is "three trillion, eight hundred ninety-seven billion, seven hundred fourteen million, two hundred seventy-eight thousand, six hundred fifty-seven".