206932987 has 2 divisors, whose sum is σ = 206932988. Its totient is φ = 206932986.

The previous prime is 206932969. The next prime is 206932991. The reversal of 206932987 is 789239602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206932987 is a prime.

It is a super-2 number, since 2×206932987² = 85642522217484338, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206932907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103466493 + 103466494.

It is an arithmetic number, because the mean of its divisors is an integer number (103466494).

Almost surely, 2^206932987 is an apocalyptic number.

206932987 is a deficient number, since it is larger than the sum of its proper divisors (1).

206932987 is an equidigital number, since it uses as much as digits as its factorization.

206932987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 206932987 is about 14385.1655186863. The cubic root of 206932987 is about 591.4843282695.

The spelling of 206932987 in words is "two hundred six million, nine hundred thirty-two thousand, nine hundred eighty-seven".