11364781 has 4 divisors (see below), whose sum is σ = 11756700. Its totient is φ = 10972864.

The previous prime is 11364739. The next prime is 11364853. The reversal of 11364781 is 18746311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4447881 + 6916900 = 2109^2 + 2630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11364781 is a prime.

It is a super-2 number, since 2×11364781² = 258316494355922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11364701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195916 + ... + 195973.

It is an arithmetic number, because the mean of its divisors is an integer number (2939175).

Almost surely, 2^11364781 is an apocalyptic number.

It is an amenable number.

11364781 is a deficient number, since it is larger than the sum of its proper divisors (391919).

11364781 is an equidigital number, since it uses as much as digits as its factorization.

11364781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391918.

The product of its digits is 4032, while the sum is 31.

The square root of 11364781 is about 3371.1690850505. The cubic root of 11364781 is about 224.8297048866.

The spelling of 11364781 in words is "eleven million, three hundred sixty-four thousand, seven hundred eighty-one".