7861909228097 has 2 divisors, whose sum is σ = 7861909228098. Its totient is φ = 7861909228096.

The previous prime is 7861909228093. The next prime is 7861909228139. The reversal of 7861909228097 is 7908229091687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5311960143361 + 2549949084736 = 2304769^2 + 1596856^2 .

It is a cyclic number.

It is not a de Polignac number, because 7861909228097 - 2² = 7861909228093 is a prime.

It is not a weakly prime, because it can be changed into another prime (7861909228093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3930954614048 + 3930954614049.

It is an arithmetic number, because the mean of its divisors is an integer number (3930954614049).

Almost surely, 2^{7861909228097} is an apocalyptic number.

It is an amenable number.

7861909228097 is a deficient number, since it is larger than the sum of its proper divisors (1).

7861909228097 is an equidigital number, since it uses as much as digits as its factorization.

7861909228097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54867456, while the sum is 68.

The spelling of 7861909228097 in words is "seven trillion, eight hundred sixty-one billion, nine hundred nine million, two hundred twenty-eight thousand, ninety-seven".