10489981 has 8 divisors (see below), whose sum is σ = 10814040. Its totient is φ = 10168128.

The previous prime is 10489951. The next prime is 10489991. The reversal of 10489981 is 18998401.

It can be written as a sum of positive squares in 4 ways, for example, as 2839225 + 7650756 = 1685^2 + 2766^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10489981 - 2¹¹ = 10487933 is a prime.

It is a super-2 number, since 2×10489981² = 220079402760722, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10489951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18555 + ... + 19111.

It is an arithmetic number, because the mean of its divisors is an integer number (1351755).

Almost surely, 2^10489981 is an apocalyptic number.

It is an amenable number.

10489981 is a deficient number, since it is larger than the sum of its proper divisors (324059).

10489981 is an equidigital number, since it uses as much as digits as its factorization.

10489981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 10489981 is about 3238.8240149783. The cubic root of 10489981 is about 218.9062865725.

The spelling of 10489981 in words is "ten million, four hundred eighty-nine thousand, nine hundred eighty-one".