11710981 has 8 divisors (see below), whose sum is σ = 12138264. Its totient is φ = 11289600.

The previous prime is 11710967. The next prime is 11710987. The reversal of 11710981 is 18901711.

It can be written as a sum of positive squares in 4 ways, for example, as 1018081 + 10692900 = 1009^2 + 3270^2 .

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 11710981 - 2⁵ = 11710949 is a prime.

It is a super-2 number, since 2×11710981² = 274294151964722, 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 (11710987) 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, 2781 + ... + 5581.

It is an arithmetic number, because the mean of its divisors is an integer number (1517283).

Almost surely, 2^11710981 is an apocalyptic number.

It is an amenable number.

11710981 is a deficient number, since it is larger than the sum of its proper divisors (427283).

11710981 is a wasteful number, since it uses less digits than its factorization.

11710981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951.

The product of its (nonzero) digits is 504, while the sum is 28.

The square root of 11710981 is about 3422.1310611956. The cubic root of 11710981 is about 227.0898684837.

The spelling of 11710981 in words is "eleven million, seven hundred ten thousand, nine hundred eighty-one".