206795554397 has 2 divisors, whose sum is σ = 206795554398. Its totient is φ = 206795554396.

The previous prime is 206795554379. The next prime is 206795554417. The reversal of 206795554397 is 793455597602.

Together with previous prime (206795554379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137636548036 + 69159006361 = 370994^2 + 262981^2 .

It is a cyclic number.

It is not a de Polignac number, because 206795554397 - 2²⁴ = 206778777181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206795554897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103397777198 + 103397777199.

It is an arithmetic number, because the mean of its divisors is an integer number (103397777199).

Almost surely, 2^206795554397 is an apocalyptic number.

It is an amenable number.

206795554397 is a deficient number, since it is larger than the sum of its proper divisors (1).

206795554397 is an equidigital number, since it uses as much as digits as its factorization.

206795554397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442000, while the sum is 62.

The spelling of 206795554397 in words is "two hundred six billion, seven hundred ninety-five million, five hundred fifty-four thousand, three hundred ninety-seven".