42297947 has 2 divisors, whose sum is σ = 42297948. Its totient is φ = 42297946.

The previous prime is 42297929. The next prime is 42297953. The reversal of 42297947 is 74979224.

42297947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42297947 - 2¹⁴ = 42281563 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42297898 and 42297907.

It is not a weakly prime, because it can be changed into another prime (42297907) 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, 21148973 + 21148974.

It is an arithmetic number, because the mean of its divisors is an integer number (21148974).

Almost surely, 2^42297947 is an apocalyptic number.

42297947 is a deficient number, since it is larger than the sum of its proper divisors (1).

42297947 is an equidigital number, since it uses as much as digits as its factorization.

42297947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 44.

The square root of 42297947 is about 6503.6871849744. The cubic root of 42297947 is about 348.4226901291.

The spelling of 42297947 in words is "forty-two million, two hundred ninety-seven thousand, nine hundred forty-seven".