10989261 has 6 divisors (see below), whose sum is σ = 15873390. Its totient is φ = 7326168.

The previous prime is 10989257. The next prime is 10989269. The reversal of 10989261 is 16298901.

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 36 = 3315^2 + 6^2 .

It is not a de Polignac number, because 10989261 - 2² = 10989257 is a prime.

It is a super-2 number, since 2×10989261² = 241527714652242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10989269) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 610506 + ... + 610523.

It is an arithmetic number, because the mean of its divisors is an integer number (2645565).

Almost surely, 2^10989261 is an apocalyptic number.

It is an amenable number.

10989261 is a deficient number, since it is larger than the sum of its proper divisors (4884129).

10989261 is a wasteful number, since it uses less digits than its factorization.

10989261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221035 (or 1221032 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 10989261 is about 3315.0054298598. The cubic root of 10989261 is about 222.3256117884.

Subtracting from 10989261 its sum of digits (36), we obtain a square (10989225 = 3315²).

The spelling of 10989261 in words is "ten million, nine hundred eighty-nine thousand, two hundred sixty-one".