206113997 has 2 divisors, whose sum is σ = 206113998. Its totient is φ = 206113996.

The previous prime is 206113981. The next prime is 206114023. The reversal of 206113997 is 799311602.

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., 149352841 + 56761156 = 12221^2 + 7534^2 .

It is a cyclic number.

It is not a de Polignac number, because 206113997 - 2⁴ = 206113981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206113997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206113907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103056998 + 103056999.

It is an arithmetic number, because the mean of its divisors is an integer number (103056999).

Almost surely, 2^206113997 is an apocalyptic number.

It is an amenable number.

206113997 is a deficient number, since it is larger than the sum of its proper divisors (1).

206113997 is an equidigital number, since it uses as much as digits as its factorization.

206113997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 206113997 is about 14356.6708188215. The cubic root of 206113997 is about 590.7029799412.

The spelling of 206113997 in words is "two hundred six million, one hundred thirteen thousand, nine hundred ninety-seven".