206887427 has 2 divisors, whose sum is σ = 206887428. Its totient is φ = 206887426.

The previous prime is 206887423. The next prime is 206887441. The reversal of 206887427 is 724788602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206887427 - 2² = 206887423 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206887423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103443713 + 103443714.

It is an arithmetic number, because the mean of its divisors is an integer number (103443714).

Almost surely, 2^206887427 is an apocalyptic number.

206887427 is a deficient number, since it is larger than the sum of its proper divisors (1).

206887427 is an equidigital number, since it uses as much as digits as its factorization.

206887427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 206887427 is about 14383.5818557131. The cubic root of 206887427 is about 591.4409164637.

The spelling of 206887427 in words is "two hundred six million, eight hundred eighty-seven thousand, four hundred twenty-seven".