42263939 has 2 divisors, whose sum is σ = 42263940. Its totient is φ = 42263938.

The previous prime is 42263917. The next prime is 42263959. The reversal of 42263939 is 93936224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42263939 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42263959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21131969 + 21131970.

It is an arithmetic number, because the mean of its divisors is an integer number (21131970).

Almost surely, 2^42263939 is an apocalyptic number.

42263939 is a deficient number, since it is larger than the sum of its proper divisors (1).

42263939 is an equidigital number, since it uses as much as digits as its factorization.

42263939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 38.

The square root of 42263939 is about 6501.0721423470. The cubic root of 42263939 is about 348.3292865739.

The spelling of 42263939 in words is "forty-two million, two hundred sixty-three thousand, nine hundred thirty-nine".