42987583 has 4 divisors (see below), whose sum is σ = 43576528. Its totient is φ = 42398640.

The previous prime is 42987569. The next prime is 42987629. The reversal of 42987583 is 38578924.

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 42987583 - 2²¹ = 40890431 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 (42987523) 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, 294363 + ... + 294508.

It is an arithmetic number, because the mean of its divisors is an integer number (10894132).

Almost surely, 2^42987583 is an apocalyptic number.

42987583 is a deficient number, since it is larger than the sum of its proper divisors (588945).

42987583 is an equidigital number, since it uses as much as digits as its factorization.

42987583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588944.

The product of its digits is 483840, while the sum is 46.

The square root of 42987583 is about 6556.4916685679. The cubic root of 42987583 is about 350.3060805490.

It can be divided in two parts, 4298 and 7583, that added together give a square (11881 = 109²).

The spelling of 42987583 in words is "forty-two million, nine hundred eighty-seven thousand, five hundred eighty-three".