42987013 has 4 divisors (see below), whose sum is σ = 43158528. Its totient is φ = 42815500.

The previous prime is 42987011. The next prime is 42987037. The reversal of 42987013 is 31078924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42987013 - 2¹ = 42987011 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 42987013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42987011) 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, 85381 + ... + 85882.

It is an arithmetic number, because the mean of its divisors is an integer number (10789632).

Almost surely, 2^42987013 is an apocalyptic number.

It is an amenable number.

42987013 is a deficient number, since it is larger than the sum of its proper divisors (171515).

42987013 is a wasteful number, since it uses less digits than its factorization.

42987013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171514.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 42987013 is about 6556.4482000547. The cubic root of 42987013 is about 350.3045322310.

It can be divided in two parts, 4298 and 7013, that added together give a palindrome (11311).

The spelling of 42987013 in words is "forty-two million, nine hundred eighty-seven thousand, thirteen".