42981913 has 8 divisors (see below), whose sum is σ = 47073600. Its totient is φ = 39002448.

The previous prime is 42981893. The next prime is 42981919. The reversal of 42981913 is 31918924.

It is the 2677-th star number.

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

It is a cyclic number.

It is not a de Polignac number, because 42981913 - 2²¹ = 40884761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42981919) 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, 27253 + ... + 28786.

It is an arithmetic number, because the mean of its divisors is an integer number (5884200).

Almost surely, 2^42981913 is an apocalyptic number.

It is an amenable number.

42981913 is a deficient number, since it is larger than the sum of its proper divisors (4091687).

42981913 is a wasteful number, since it uses less digits than its factorization.

42981913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56111.

The product of its digits is 15552, while the sum is 37.

The square root of 42981913 is about 6556.0592584265. The cubic root of 42981913 is about 350.2906782501.

The spelling of 42981913 in words is "forty-two million, nine hundred eighty-one thousand, nine hundred thirteen".