993481 has 2 divisors, whose sum is σ = 993482. Its totient is φ = 993480.

The previous prime is 993479. The next prime is 993493. The reversal of 993481 is 184399.

993481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 467856 = 725^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 993481 - 2¹ = 993479 is a prime.

It is a super-2 number, since 2×993481² = 1974008994722, which contains 22 as substring.

Together with 993479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (993401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496740 + 496741.

It is an arithmetic number, because the mean of its divisors is an integer number (496741).

2⁹⁹³⁴⁸¹ is an apocalyptic number.

It is an amenable number.

993481 is a deficient number, since it is larger than the sum of its proper divisors (1).

993481 is an equidigital number, since it uses as much as digits as its factorization.

993481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 993481 is about 996.7351704440. The cubic root of 993481 is about 99.7822260895.

The spelling of 993481 in words is "nine hundred ninety-three thousand, four hundred eighty-one".