642093 has 4 divisors (see below), whose sum is σ = 856128. Its totient is φ = 428060.

The previous prime is 642079. The next prime is 642113. The reversal of 642093 is 390246.

642093 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, 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 642093 - 2⁴ = 642077 is a prime.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642013) 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, 107013 + ... + 107018.

It is an arithmetic number, because the mean of its divisors is an integer number (214032).

2⁶⁴²⁰⁹³ is an apocalyptic number.

It is an amenable number.

642093 is a deficient number, since it is larger than the sum of its proper divisors (214035).

642093 is a wasteful number, since it uses less digits than its factorization.

642093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214034.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 642093 is about 801.3070572508. The cubic root of 642093 is about 86.2712277093.

The spelling of 642093 in words is "six hundred forty-two thousand, ninety-three".