67731202897 has 2 divisors, whose sum is σ = 67731202898. Its totient is φ = 67731202896.

The previous prime is 67731202849. The next prime is 67731202901. The reversal of 67731202897 is 79820213776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65126529601 + 2604673296 = 255199^2 + 51036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67731202897 is a prime.

It is not a weakly prime, because it can be changed into another prime (67731202997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33865601448 + 33865601449.

It is an arithmetic number, because the mean of its divisors is an integer number (33865601449).

Almost surely, 2^67731202897 is an apocalyptic number.

It is an amenable number.

67731202897 is a deficient number, since it is larger than the sum of its proper divisors (1).

67731202897 is an equidigital number, since it uses as much as digits as its factorization.

67731202897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 67731202897 in words is "sixty-seven billion, seven hundred thirty-one million, two hundred two thousand, eight hundred ninety-seven".