42645983 has 4 divisors (see below), whose sum is σ = 42832440. Its totient is φ = 42459528.

The previous prime is 42645961. The next prime is 42645989. The reversal of 42645983 is 38954624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42645983 - 2⁶ = 42645919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42645983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42645989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92885 + ... + 93342.

It is an arithmetic number, because the mean of its divisors is an integer number (10708110).

Almost surely, 2^42645983 is an apocalyptic number.

42645983 is a deficient number, since it is larger than the sum of its proper divisors (186457).

42645983 is a wasteful number, since it uses less digits than its factorization.

42645983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186456.

The product of its digits is 207360, while the sum is 41.

The square root of 42645983 is about 6530.3891920773. The cubic root of 42645983 is about 349.3757116205.

The spelling of 42645983 in words is "forty-two million, six hundred forty-five thousand, nine hundred eighty-three".