206923693 has 2 divisors, whose sum is σ = 206923694. Its totient is φ = 206923692.

The previous prime is 206923681. The next prime is 206923723. The reversal of 206923693 is 396329602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192155044 + 14768649 = 13862^2 + 3843^2 .

It is a cyclic number.

It is not a de Polignac number, because 206923693 - 2²¹ = 204826541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206923193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103461846 + 103461847.

It is an arithmetic number, because the mean of its divisors is an integer number (103461847).

Almost surely, 2^206923693 is an apocalyptic number.

It is an amenable number.

206923693 is a deficient number, since it is larger than the sum of its proper divisors (1).

206923693 is an equidigital number, since it uses as much as digits as its factorization.

206923693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 206923693 is about 14384.8424739376. The cubic root of 206923693 is about 591.4754730072.

The spelling of 206923693 in words is "two hundred six million, nine hundred twenty-three thousand, six hundred ninety-three".