973981 has 16 divisors (see below), whose sum is σ = 1119744. Its totient is φ = 841984.

The previous prime is 973957. The next prime is 974003. The reversal of 973981 is 189379.

It is not a de Polignac number, because 973981 - 2⁷ = 973853 is a prime.

It is a super-2 number, since 2×973981² = 1897277976722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 973981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (973901) 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 15 ways as a sum of consecutive naturals, for example, 18351 + ... + 18403.

It is an arithmetic number, because the mean of its divisors is an integer number (69984).

2⁹⁷³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

973981 is a deficient number, since it is larger than the sum of its proper divisors (145763).

973981 is a wasteful number, since it uses less digits than its factorization.

973981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140.

The product of its digits is 13608, while the sum is 37.

The square root of 973981 is about 986.9047573094. The cubic root of 973981 is about 99.1250672525.

The spelling of 973981 in words is "nine hundred seventy-three thousand, nine hundred eighty-one".