989972 has 12 divisors (see below), whose sum is σ = 1779540. Its totient is φ = 481536.

The previous prime is 989971. The next prime is 989977. The reversal of 989972 is 279989.

989972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 857476 + 132496 = 926^2 + 364^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989972.

It is not an unprimeable number, because it can be changed into a prime (989971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3197 + ... + 3492.

It is an arithmetic number, because the mean of its divisors is an integer number (148295).

2⁹⁸⁹⁹⁷² is an apocalyptic number.

It is an amenable number.

989972 is a deficient number, since it is larger than the sum of its proper divisors (789568).

989972 is a wasteful number, since it uses less digits than its factorization.

989972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6730 (or 6728 counting only the distinct ones).

The product of its digits is 81648, while the sum is 44.

The square root of 989972 is about 994.9733664777. The cubic root of 989972 is about 99.6646097245.

The spelling of 989972 in words is "nine hundred eighty-nine thousand, nine hundred seventy-two".