993947 has 4 divisors (see below), whose sum is σ = 1046280. Its totient is φ = 941616.

The previous prime is 993943. The next prime is 993961. The reversal of 993947 is 749399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749399 = 7 ⋅107057.

It is a cyclic number.

It is not a de Polignac number, because 993947 - 2² = 993943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993943) 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, 26138 + ... + 26175.

It is an arithmetic number, because the mean of its divisors is an integer number (261570).

2⁹⁹³⁹⁴⁷ is an apocalyptic number.

993947 is a deficient number, since it is larger than the sum of its proper divisors (52333).

993947 is a wasteful number, since it uses less digits than its factorization.

993947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52332.

The product of its digits is 61236, while the sum is 41.

The square root of 993947 is about 996.9689062353. The cubic root of 993947 is about 99.7978248609.

The spelling of 993947 in words is "nine hundred ninety-three thousand, nine hundred forty-seven".