993131 has 4 divisors (see below), whose sum is σ = 995472. Its totient is φ = 990792.

The previous prime is 993121. The next prime is 993137. The reversal of 993131 is 131399.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993131 is a prime.

It is a super-2 number, since 2×993131² = 1972618366322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 993131.

It is not an unprimeable number, because it can be changed into a prime (993137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335 + ... + 1448.

It is an arithmetic number, because the mean of its divisors is an integer number (248868).

2⁹⁹³¹³¹ is an apocalyptic number.

993131 is a deficient number, since it is larger than the sum of its proper divisors (2341).

993131 is a wasteful number, since it uses less digits than its factorization.

993131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340.

The product of its digits is 729, while the sum is 26.

The square root of 993131 is about 996.5595817612. The cubic root of 993131 is about 99.7705070662.

The spelling of 993131 in words is "nine hundred ninety-three thousand, one hundred thirty-one".