42791983 has 24 divisors (see below), whose sum is σ = 49278240. Its totient is φ = 37065600.

The previous prime is 42791981. The next prime is 42791993. The reversal of 42791983 is 38919724.

It is not a de Polignac number, because 42791983 - 2¹ = 42791981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42791981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392533 + ... + 392641.

It is an arithmetic number, because the mean of its divisors is an integer number (2053260).

Almost surely, 2^42791983 is an apocalyptic number.

42791983 is a deficient number, since it is larger than the sum of its proper divisors (6486257).

42791983 is a wasteful number, since it uses less digits than its factorization.

42791983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 246 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 42791983 is about 6541.5581477199. The cubic root of 42791983 is about 349.7739574464.

The spelling of 42791983 in words is "forty-two million, seven hundred ninety-one thousand, nine hundred eighty-three".