11376821 has 4 divisors (see below), whose sum is σ = 11591532. Its totient is φ = 11162112.

The previous prime is 11376809. The next prime is 11376889. The reversal of 11376821 is 12867311.

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 2937796 + 8439025 = 1714^2 + 2905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11376821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11376121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107276 + ... + 107381.

It is an arithmetic number, because the mean of its divisors is an integer number (2897883).

Almost surely, 2^11376821 is an apocalyptic number.

It is an amenable number.

11376821 is a deficient number, since it is larger than the sum of its proper divisors (214711).

11376821 is an equidigital number, since it uses as much as digits as its factorization.

11376821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214710.

The product of its digits is 2016, while the sum is 29.

The square root of 11376821 is about 3372.9543430055. The cubic root of 11376821 is about 224.9090727243.

The spelling of 11376821 in words is "eleven million, three hundred seventy-six thousand, eight hundred twenty-one".