42927917 has 4 divisors (see below), whose sum is σ = 44408220. Its totient is φ = 41447616.

The previous prime is 42927883. The next prime is 42927947. The reversal of 42927917 is 71972924.

42927917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9357481 + 33570436 = 3059^2 + 5794^2 .

It is a cyclic number.

It is not a de Polignac number, because 42927917 - 2¹⁰ = 42926893 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 (42927947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740108 + ... + 740165.

It is an arithmetic number, because the mean of its divisors is an integer number (11102055).

Almost surely, 2^42927917 is an apocalyptic number.

It is an amenable number.

42927917 is a deficient number, since it is larger than the sum of its proper divisors (1480303).

42927917 is a wasteful number, since it uses less digits than its factorization.

42927917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480302.

The product of its digits is 63504, while the sum is 41.

The square root of 42927917 is about 6551.9399417272. The cubic root of 42927917 is about 350.1439326383.

The spelling of 42927917 in words is "forty-two million, nine hundred twenty-seven thousand, nine hundred seventeen".