6542779 has 2 divisors, whose sum is σ = 6542780. Its totient is φ = 6542778.

The previous prime is 6542749. The next prime is 6542791. The reversal of 6542779 is 9772456.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6542779 - 2¹⁵ = 6510011 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6542749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3271389 + 3271390.

It is an arithmetic number, because the mean of its divisors is an integer number (3271390).

Almost surely, 2^6542779 is an apocalyptic number.

6542779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6542779 is an equidigital number, since it uses as much as digits as its factorization.

6542779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 6542779 is about 2557.8856502979. The cubic root of 6542779 is about 187.0340811228.

The spelling of 6542779 in words is "six million, five hundred forty-two thousand, seven hundred seventy-nine".