42775913 has 2 divisors, whose sum is σ = 42775914. Its totient is φ = 42775912.

The previous prime is 42775907. The next prime is 42775979. The reversal of 42775913 is 31957724.

42775913 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 can be written as a sum of positive squares in only one way, i.e., 39980329 + 2795584 = 6323^2 + 1672^2 .

It is a cyclic number.

It is not a de Polignac number, because 42775913 - 2⁶ = 42775849 is a prime.

It is not a weakly prime, because it can be changed into another prime (42775903) 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, 21387956 + 21387957.

It is an arithmetic number, because the mean of its divisors is an integer number (21387957).

Almost surely, 2^42775913 is an apocalyptic number.

It is an amenable number.

42775913 is a deficient number, since it is larger than the sum of its proper divisors (1).

42775913 is an equidigital number, since it uses as much as digits as its factorization.

42775913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 42775913 is about 6540.3297317490. The cubic root of 42775913 is about 349.7301675364.

The spelling of 42775913 in words is "forty-two million, seven hundred seventy-five thousand, nine hundred thirteen".