42293287 has 2 divisors, whose sum is σ = 42293288. Its totient is φ = 42293286.

The previous prime is 42293243. The next prime is 42293309. The reversal of 42293287 is 78239224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42293287 - 2¹⁹ = 41768999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42293227) 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, 21146643 + 21146644.

It is an arithmetic number, because the mean of its divisors is an integer number (21146644).

Almost surely, 2^42293287 is an apocalyptic number.

42293287 is a deficient number, since it is larger than the sum of its proper divisors (1).

42293287 is an equidigital number, since it uses as much as digits as its factorization.

42293287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 42293287 is about 6503.3289167933. The cubic root of 42293287 is about 348.4098943200.

The spelling of 42293287 in words is "forty-two million, two hundred ninety-three thousand, two hundred eighty-seven".