993901 has 4 divisors (see below), whose sum is σ = 995904. Its totient is φ = 991900.

The previous prime is 993893. The next prime is 993907. The reversal of 993901 is 109399.

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, and also an emirpimes, since its reverse is a distinct semiprime: 109399 = 31 ⋅3529.

It is a cyclic number.

It is not a de Polignac number, because 993901 - 2³ = 993893 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 (993907) 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, 366 + ... + 1456.

It is an arithmetic number, because the mean of its divisors is an integer number (248976).

2⁹⁹³⁹⁰¹ is an apocalyptic number.

It is an amenable number.

993901 is a deficient number, since it is larger than the sum of its proper divisors (2003).

993901 is a wasteful number, since it uses less digits than its factorization.

993901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 993901 is about 996.9458360413. The cubic root of 993901 is about 99.7962852850.

The spelling of 993901 in words is "nine hundred ninety-three thousand, nine hundred one".