11932721 has 2 divisors, whose sum is σ = 11932722. Its totient is φ = 11932720.

The previous prime is 11932673. The next prime is 11932751. The reversal of 11932721 is 12723911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11316496 + 616225 = 3364^2 + 785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11932721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11932751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5966360 + 5966361.

It is an arithmetic number, because the mean of its divisors is an integer number (5966361).

Almost surely, 2^11932721 is an apocalyptic number.

It is an amenable number.

11932721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11932721 is an equidigital number, since it uses as much as digits as its factorization.

11932721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 26.

The square root of 11932721 is about 3454.3770784325. The cubic root of 11932721 is about 228.5141840091.

The spelling of 11932721 in words is "eleven million, nine hundred thirty-two thousand, seven hundred twenty-one".