68028251 has 2 divisors, whose sum is σ = 68028252. Its totient is φ = 68028250.

The previous prime is 68028199. The next prime is 68028263. The reversal of 68028251 is 15282086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68028251 - 2⁶ = 68028187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68028281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34014125 + 34014126.

It is an arithmetic number, because the mean of its divisors is an integer number (34014126).

Almost surely, 2^68028251 is an apocalyptic number.

68028251 is a deficient number, since it is larger than the sum of its proper divisors (1).

68028251 is an equidigital number, since it uses as much as digits as its factorization.

68028251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 68028251 is about 8247.9240418423. The cubic root of 68028251 is about 408.2220272864. Note that the first 3 decimals are identical.

The spelling of 68028251 in words is "sixty-eight million, twenty-eight thousand, two hundred fifty-one".