981493 has 2 divisors, whose sum is σ = 981494. Its totient is φ = 981492.

The previous prime is 981481. The next prime is 981517. The reversal of 981493 is 394189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 675684 + 305809 = 822^2 + 553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981493 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490746 + 490747.

It is an arithmetic number, because the mean of its divisors is an integer number (490747).

2⁹⁸¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

981493 is a deficient number, since it is larger than the sum of its proper divisors (1).

981493 is an equidigital number, since it uses as much as digits as its factorization.

981493 is an odious number, because the sum of its binary digits is odd.

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

The square root of 981493 is about 990.7032855502. The cubic root of 981493 is about 99.3792547260.

The spelling of 981493 in words is "nine hundred eighty-one thousand, four hundred ninety-three".