206828651 has 2 divisors, whose sum is σ = 206828652. Its totient is φ = 206828650.

The previous prime is 206828617. The next prime is 206828653. The reversal of 206828651 is 156828602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206828651 is a prime.

Together with 206828653, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_11435969 and since 206828651 and 11435969 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (206828653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103414325 + 103414326.

It is an arithmetic number, because the mean of its divisors is an integer number (103414326).

Almost surely, 2^206828651 is an apocalyptic number.

206828651 is a deficient number, since it is larger than the sum of its proper divisors (1).

206828651 is an equidigital number, since it uses as much as digits as its factorization.

206828651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 206828651 is about 14381.5385477354. The cubic root of 206828651 is about 591.3849023883.

The spelling of 206828651 in words is "two hundred six million, eight hundred twenty-eight thousand, six hundred fifty-one".