42670993 has 8 divisors (see below), whose sum is σ = 43223400. Its totient is φ = 42121728.

The previous prime is 42670967. The next prime is 42671009. The reversal of 42670993 is 39907624.

It can be written as a sum of positive squares in 4 ways, for example, as 589824 + 42081169 = 768^2 + 6487^2 .

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 42670993 - 2¹³ = 42662801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42670913) 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, 37923 + ... + 39031.

It is an arithmetic number, because the mean of its divisors is an integer number (5402925).

Almost surely, 2^42670993 is an apocalyptic number.

It is an amenable number.

42670993 is a deficient number, since it is larger than the sum of its proper divisors (552407).

42670993 is a wasteful number, since it uses less digits than its factorization.

42670993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 42670993 is about 6532.3038049374. The cubic root of 42670993 is about 349.4439961212.

The spelling of 42670993 in words is "forty-two million, six hundred seventy thousand, nine hundred ninety-three".