42664093 has 4 divisors (see below), whose sum is σ = 42880860. Its totient is φ = 42447328.

The previous prime is 42664087. The next prime is 42664147. The reversal of 42664093 is 39046624.

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 35497764 + 7166329 = 5958^2 + 2677^2 .

It is a cyclic number.

It is not a de Polignac number, because 42664093 - 2¹⁷ = 42533021 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 (42664043) 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, 108088 + ... + 108481.

It is an arithmetic number, because the mean of its divisors is an integer number (10720215).

Almost surely, 2^42664093 is an apocalyptic number.

It is an amenable number.

42664093 is a deficient number, since it is larger than the sum of its proper divisors (216767).

42664093 is a wasteful number, since it uses less digits than its factorization.

42664093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216766.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 42664093 is about 6531.7756391352. The cubic root of 42664093 is about 349.4251598004.

The spelling of 42664093 in words is "forty-two million, six hundred sixty-four thousand, ninety-three".