68472779 has 2 divisors, whose sum is σ = 68472780. Its totient is φ = 68472778.

The previous prime is 68472763. The next prime is 68472797. The reversal of 68472779 is 97727486.

Together with next prime (68472797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68472779 - 2⁴ = 68472763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68472179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34236389 + 34236390.

It is an arithmetic number, because the mean of its divisors is an integer number (34236390).

Almost surely, 2^68472779 is an apocalyptic number.

68472779 is a deficient number, since it is larger than the sum of its proper divisors (1).

68472779 is an equidigital number, since it uses as much as digits as its factorization.

68472779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 50.

The square root of 68472779 is about 8274.8280344669. The cubic root of 68472779 is about 409.1092679363.

The spelling of 68472779 in words is "sixty-eight million, four hundred seventy-two thousand, seven hundred seventy-nine".