993404 has 6 divisors (see below), whose sum is σ = 1738464. Its totient is φ = 496700.

The previous prime is 993401. The next prime is 993407. The reversal of 993404 is 404399.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (993401) and next prime (993407).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124172 + ... + 124179.

It is an arithmetic number, because the mean of its divisors is an integer number (289744).

2⁹⁹³⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

993404 is a deficient number, since it is larger than the sum of its proper divisors (745060).

993404 is a wasteful number, since it uses less digits than its factorization.

993404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248355 (or 248353 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 993404 is about 996.6965435879. The cubic root of 993404 is about 99.7796481406.

The spelling of 993404 in words is "nine hundred ninety-three thousand, four hundred four".