11981743 has 2 divisors, whose sum is σ = 11981744. Its totient is φ = 11981742.

The previous prime is 11981713. The next prime is 11981773. The reversal of 11981743 is 34718911.

It is a balanced prime because it is at equal distance from previous prime (11981713) and next prime (11981773).

It is a cyclic number.

It is not a de Polignac number, because 11981743 - 2⁹ = 11981231 is a prime.

It is equal to p₇₈₆₉₃₁ and since 11981743 and 786931 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 11981699 and 11981708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11981713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5990871 + 5990872.

It is an arithmetic number, because the mean of its divisors is an integer number (5990872).

Almost surely, 2^11981743 is an apocalyptic number.

11981743 is a deficient number, since it is larger than the sum of its proper divisors (1).

11981743 is an equidigital number, since it uses as much as digits as its factorization.

11981743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 34.

The square root of 11981743 is about 3461.4654411102. The cubic root of 11981743 is about 228.8266837573.

The spelling of 11981743 in words is "eleven million, nine hundred eighty-one thousand, seven hundred forty-three".