42981847 has 2 divisors, whose sum is σ = 42981848. Its totient is φ = 42981846.

The previous prime is 42981839. The next prime is 42981859. The reversal of 42981847 is 74818924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42981847 - 2³ = 42981839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42981877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21490923 + 21490924.

It is an arithmetic number, because the mean of its divisors is an integer number (21490924).

Almost surely, 2^42981847 is an apocalyptic number.

42981847 is a deficient number, since it is larger than the sum of its proper divisors (1).

42981847 is an equidigital number, since it uses as much as digits as its factorization.

42981847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 42981847 is about 6556.0542249130. The cubic root of 42981847 is about 350.2904989561.

The spelling of 42981847 in words is "forty-two million, nine hundred eighty-one thousand, eight hundred forty-seven".