67542779 has 2 divisors, whose sum is σ = 67542780. Its totient is φ = 67542778.

The previous prime is 67542737. The next prime is 67542793. The reversal of 67542779 is 97724576.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67542779 - 2⁸ = 67542523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67572779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33771389 + 33771390.

It is an arithmetic number, because the mean of its divisors is an integer number (33771390).

Almost surely, 2^67542779 is an apocalyptic number.

67542779 is a deficient number, since it is larger than the sum of its proper divisors (1).

67542779 is an equidigital number, since it uses as much as digits as its factorization.

67542779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740880, while the sum is 47.

The square root of 67542779 is about 8218.4413972480. The cubic root of 67542779 is about 407.2486391922.

The spelling of 67542779 in words is "sixty-seven million, five hundred forty-two thousand, seven hundred seventy-nine".