206015497 has 2 divisors, whose sum is σ = 206015498. Its totient is φ = 206015496.

The previous prime is 206015479. The next prime is 206015501. The reversal of 206015497 is 794510602.

Together with previous prime (206015479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151683856 + 54331641 = 12316^2 + 7371^2 .

It is a cyclic number.

It is not a de Polignac number, because 206015497 - 2¹¹ = 206013449 is a prime.

It is not a weakly prime, because it can be changed into another prime (206015437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103007748 + 103007749.

It is an arithmetic number, because the mean of its divisors is an integer number (103007749).

Almost surely, 2^206015497 is an apocalyptic number.

It is an amenable number.

206015497 is a deficient number, since it is larger than the sum of its proper divisors (1).

206015497 is an equidigital number, since it uses as much as digits as its factorization.

206015497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 206015497 is about 14353.2399478306. The cubic root of 206015497 is about 590.6088677583.

The spelling of 206015497 in words is "two hundred six million, fifteen thousand, four hundred ninety-seven".