425993 has 4 divisors (see below), whose sum is σ = 427668. Its totient is φ = 424320.

The previous prime is 425989. The next prime is 426007. The reversal of 425993 is 399524.

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 26569 + 399424 = 163^2 + 632^2 .

It is a cyclic number.

It is not a de Polignac number, because 425993 - 2² = 425989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368 + ... + 993.

It is an arithmetic number, because the mean of its divisors is an integer number (106917).

425993 is a Friedman number, since it can be written as 9+(9+4)*(2^3)^5, using all its digits and the basic arithmetic operations.

2⁴²⁵⁹⁹³ is an apocalyptic number.

It is an amenable number.

425993 is a deficient number, since it is larger than the sum of its proper divisors (1675).

425993 is a wasteful number, since it uses less digits than its factorization.

425993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674.

The product of its digits is 9720, while the sum is 32.

The square root of 425993 is about 652.6813924113. The cubic root of 425993 is about 75.2432399015.

The spelling of 425993 in words is "four hundred twenty-five thousand, nine hundred ninety-three".