11695981 has 6 divisors (see below), whose sum is σ = 12856046. Its totient is φ = 10632600.

The previous prime is 11695979. The next prime is 11695991. The reversal of 11695981 is 18959611.

It can be written as a sum of positive squares in only one way, i.e., 11329956 + 366025 = 3366^2 + 605^2 .

It is not a de Polignac number, because 11695981 - 2¹ = 11695979 is a prime.

It is a super-2 number, since 2×11695981² = 273591943104722, 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 (11695951) 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, 48210 + ... + 48451.

Almost surely, 2^11695981 is an apocalyptic number.

11695981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11695981 is a deficient number, since it is larger than the sum of its proper divisors (1160065).

11695981 is an equidigital number, since it uses as much as digits as its factorization.

11695981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96683 (or 96672 counting only the distinct ones).

The product of its digits is 19440, while the sum is 40.

The square root of 11695981 is about 3419.9387421414. The cubic root of 11695981 is about 226.9928711042.

The spelling of 11695981 in words is "eleven million, six hundred ninety-five thousand, nine hundred eighty-one".