11584981 has 2 divisors, whose sum is σ = 11584982. Its totient is φ = 11584980.

The previous prime is 11584961. The next prime is 11584987. The reversal of 11584981 is 18948511.

11584981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11329956 + 255025 = 3366^2 + 505^2 .

It is an emirp because it is prime and its reverse (18948511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11584981 - 2¹⁵ = 11552213 is a prime.

It is a super-2 number, since 2×11584981² = 268423569540722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11584981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11584987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5792490 + 5792491.

It is an arithmetic number, because the mean of its divisors is an integer number (5792491).

Almost surely, 2^11584981 is an apocalyptic number.

It is an amenable number.

11584981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11584981 is an equidigital number, since it uses as much as digits as its factorization.

11584981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 37.

The square root of 11584981 is about 3403.6716939211. The cubic root of 11584981 is about 226.2725000262.

The spelling of 11584981 in words is "eleven million, five hundred eighty-four thousand, nine hundred eighty-one".