893638993 has 8 divisors (see below), whose sum is σ = 985853736. Its totient is φ = 804777600.

The previous prime is 893638969. The next prime is 893639023. The reversal of 893638993 is 399836398.

893638993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2795584 + 890843409 = 1672^2 + 29847^2 .

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 893638993 - 2⁵ = 893638961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (893638903) 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, 837778 + ... + 838843.

It is an arithmetic number, because the mean of its divisors is an integer number (123231717).

Almost surely, 2^893638993 is an apocalyptic number.

It is an amenable number.

893638993 is a deficient number, since it is larger than the sum of its proper divisors (92214743).

893638993 is a wasteful number, since it uses less digits than its factorization.

893638993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676675.

The product of its digits is 7558272, while the sum is 58.

The square root of 893638993 is about 29893.7952257655. The cubic root of 893638993 is about 963.2093806372.

The spelling of 893638993 in words is "eight hundred ninety-three million, six hundred thirty-eight thousand, nine hundred ninety-three".