42707779 has 2 divisors, whose sum is σ = 42707780. Its totient is φ = 42707778.

The previous prime is 42707767. The next prime is 42707831. The reversal of 42707779 is 97770724.

42707779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42707779 - 2¹⁷ = 42576707 is a prime.

It is a super-2 number, since 2×42707779² = 3647908774225682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42707759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21353889 + 21353890.

It is an arithmetic number, because the mean of its divisors is an integer number (21353890).

Almost surely, 2^42707779 is an apocalyptic number.

42707779 is a deficient number, since it is larger than the sum of its proper divisors (1).

42707779 is an equidigital number, since it uses as much as digits as its factorization.

42707779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172872, while the sum is 43.

The square root of 42707779 is about 6535.1188971586. The cubic root of 42707779 is about 349.5443840255.

The spelling of 42707779 in words is "forty-two million, seven hundred seven thousand, seven hundred seventy-nine".