981673 has 24 divisors (see below), whose sum is σ = 1319360. Its totient is φ = 712800.

The previous prime is 981653. The next prime is 981683. The reversal of 981673 is 376189.

981673 = T₆₂ + T₆₃ + ... + T₁₈₂.

981673 = 22² + 23² + ... + 143².

It is a de Polignac number, because none of the positive numbers 2^k-981673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (981623) 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 23 ways as a sum of consecutive naturals, for example, 16063 + ... + 16123.

2⁹⁸¹⁶⁷³ is an apocalyptic number.

It is an amenable number.

981673 is a deficient number, since it is larger than the sum of its proper divisors (337687).

981673 is a wasteful number, since it uses less digits than its factorization.

981673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 98 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 981673 is about 990.7941259414. The cubic root of 981673 is about 99.3853295435.

It can be divided in two parts, 9816 and 73, that added together give a palindrome (9889).

The spelling of 981673 in words is "nine hundred eighty-one thousand, six hundred seventy-three".