42979983 has 8 divisors (see below), whose sum is σ = 57410688. Its totient is φ = 28601304.

The previous prime is 42979967. The next prime is 42979987. The reversal of 42979983 is 38997924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42979983 - 2⁴ = 42979967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42979987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11035 + ... + 14412.

It is an arithmetic number, because the mean of its divisors is an integer number (7176336).

Almost surely, 2^42979983 is an apocalyptic number.

42979983 is a deficient number, since it is larger than the sum of its proper divisors (14430705).

42979983 is a wasteful number, since it uses less digits than its factorization.

42979983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26013.

The product of its digits is 979776, while the sum is 51.

The square root of 42979983 is about 6555.9120646940. The cubic root of 42979983 is about 350.2854351832.

The spelling of 42979983 in words is "forty-two million, nine hundred seventy-nine thousand, nine hundred eighty-three".