67983779 has 2 divisors, whose sum is σ = 67983780. Its totient is φ = 67983778.

The previous prime is 67983719. The next prime is 67983793. The reversal of 67983779 is 97738976.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67983779 - 2⁸ = 67983523 is a prime.

It is not a weakly prime, because it can be changed into another prime (67983709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33991889 + 33991890.

It is an arithmetic number, because the mean of its divisors is an integer number (33991890).

Almost surely, 2^67983779 is an apocalyptic number.

67983779 is a deficient number, since it is larger than the sum of its proper divisors (1).

67983779 is an equidigital number, since it uses as much as digits as its factorization.

67983779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000752, while the sum is 56.

The square root of 67983779 is about 8245.2276499803. The cubic root of 67983779 is about 408.1330524502.

The spelling of 67983779 in words is "sixty-seven million, nine hundred eighty-three thousand, seven hundred seventy-nine".