10989781 has 8 divisors (see below), whose sum is σ = 12134304. Its totient is φ = 9869520.

The previous prime is 10989773. The next prime is 10989787. The reversal of 10989781 is 18798901.

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 10989781 - 2³ = 10989773 is a prime.

It is a super-2 number, since 2×10989781² = 241550572855922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10989787) 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 7 ways as a sum of consecutive naturals, for example, 5106 + ... + 6931.

It is an arithmetic number, because the mean of its divisors is an integer number (1516788).

Almost surely, 2^10989781 is an apocalyptic number.

10989781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10989781 is a deficient number, since it is larger than the sum of its proper divisors (1144523).

10989781 is a wasteful number, since it uses less digits than its factorization.

10989781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12131.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 10989781 is about 3315.0838601761. The cubic root of 10989781 is about 222.3291184693.

The spelling of 10989781 in words is "ten million, nine hundred eighty-nine thousand, seven hundred eighty-one".