206938319377 has 2 divisors, whose sum is σ = 206938319378. Its totient is φ = 206938319376.

The previous prime is 206938319353. The next prime is 206938319417. The reversal of 206938319377 is 773913839602.

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., 155670491601 + 51267827776 = 394551^2 + 226424^2 .

It is a cyclic number.

It is not a de Polignac number, because 206938319377 - 2³¹ = 204790835729 is a prime.

It is not a weakly prime, because it can be changed into another prime (206938319317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103469159688 + 103469159689.

It is an arithmetic number, because the mean of its divisors is an integer number (103469159689).

Almost surely, 2^206938319377 is an apocalyptic number.

It is an amenable number.

206938319377 is a deficient number, since it is larger than the sum of its proper divisors (1).

206938319377 is an equidigital number, since it uses as much as digits as its factorization.

206938319377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10287648, while the sum is 58.

The spelling of 206938319377 in words is "two hundred six billion, nine hundred thirty-eight million, three hundred nineteen thousand, three hundred seventy-seven".