42905983 has 2 divisors, whose sum is σ = 42905984. Its totient is φ = 42905982.

The previous prime is 42905981. The next prime is 42905999. The reversal of 42905983 is 38950924.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42905983 - 2¹ = 42905981 is a prime.

Together with 42905981, it forms a pair of twin primes.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42905981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21452991 + 21452992.

It is an arithmetic number, because the mean of its divisors is an integer number (21452992).

Almost surely, 2^42905983 is an apocalyptic number.

42905983 is a deficient number, since it is larger than the sum of its proper divisors (1).

42905983 is an equidigital number, since it uses as much as digits as its factorization.

42905983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 42905983 is about 6550.2658724666. The cubic root of 42905983 is about 350.0842871833.

The spelling of 42905983 in words is "forty-two million, nine hundred five thousand, nine hundred eighty-three".