84068779 has 2 divisors, whose sum is σ = 84068780. Its totient is φ = 84068778.

The previous prime is 84068713. The next prime is 84068783. The reversal of 84068779 is 97786048.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84068779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84068279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42034389 + 42034390.

It is an arithmetic number, because the mean of its divisors is an integer number (42034390).

Almost surely, 2^84068779 is an apocalyptic number.

84068779 is a deficient number, since it is larger than the sum of its proper divisors (1).

84068779 is an equidigital number, since it uses as much as digits as its factorization.

84068779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 84068779 is about 9168.9028242206. The cubic root of 84068779 is about 438.0714127078.

The spelling of 84068779 in words is "eighty-four million, sixty-eight thousand, seven hundred seventy-nine".