56567779 has 2 divisors, whose sum is σ = 56567780. Its totient is φ = 56567778.

The previous prime is 56567767. The next prime is 56567803. The reversal of 56567779 is 97776565.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56567779 is a prime.

It is not a weakly prime, because it can be changed into another prime (56567729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28283889 + 28283890.

It is an arithmetic number, because the mean of its divisors is an integer number (28283890).

Almost surely, 2^56567779 is an apocalyptic number.

56567779 is a deficient number, since it is larger than the sum of its proper divisors (1).

56567779 is an equidigital number, since it uses as much as digits as its factorization.

56567779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2778300, while the sum is 52.

The square root of 56567779 is about 7521.1554298525. The cubic root of 56567779 is about 383.8748936888.

The spelling of 56567779 in words is "fifty-six million, five hundred sixty-seven thousand, seven hundred seventy-nine".