42678331 has 2 divisors, whose sum is σ = 42678332. Its totient is φ = 42678330.

The previous prime is 42678329. The next prime is 42678373. The reversal of 42678331 is 13387624.

It is a happy number.

42678331 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 is a cyclic number.

It is not a de Polignac number, because 42678331 - 2¹ = 42678329 is a prime.

It is a super-2 number, since 2×42678331² = 3642879873891122, which contains 22 as substring.

Together with 42678329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42678301) 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, 21339165 + 21339166.

It is an arithmetic number, because the mean of its divisors is an integer number (21339166).

Almost surely, 2^42678331 is an apocalyptic number.

42678331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42678331 is an equidigital number, since it uses as much as digits as its factorization.

42678331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 42678331 is about 6532.8654509335. The cubic root of 42678331 is about 349.4640259111.

The spelling of 42678331 in words is "forty-two million, six hundred seventy-eight thousand, three hundred thirty-one".