42279169 has 2 divisors, whose sum is σ = 42279170. Its totient is φ = 42279168.

The previous prime is 42279157. The next prime is 42279203. The reversal of 42279169 is 96197224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22137025 + 20142144 = 4705^2 + 4488^2 .

It is a cyclic number.

It is not a de Polignac number, because 42279169 - 2¹¹ = 42277121 is a prime.

It is a super-2 number, since 2×42279169² = 3575056262661122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42279109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21139584 + 21139585.

It is an arithmetic number, because the mean of its divisors is an integer number (21139585).

Almost surely, 2^42279169 is an apocalyptic number.

It is an amenable number.

42279169 is a deficient number, since it is larger than the sum of its proper divisors (1).

42279169 is an equidigital number, since it uses as much as digits as its factorization.

42279169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 42279169 is about 6502.2433820951. The cubic root of 42279169 is about 348.3711222227.

The spelling of 42279169 in words is "forty-two million, two hundred seventy-nine thousand, one hundred sixty-nine".