11921633 has 2 divisors, whose sum is σ = 11921634. Its totient is φ = 11921632.

The previous prime is 11921593. The next prime is 11921669. The reversal of 11921633 is 33612911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11916304 + 5329 = 3452^2 + 73^2 .

It is an emirp because it is prime and its reverse (33612911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11921633 - 2¹² = 11917537 is a prime.

It is not a weakly prime, because it can be changed into another prime (11921933) 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 as a sum of consecutive naturals, namely, 5960816 + 5960817.

It is an arithmetic number, because the mean of its divisors is an integer number (5960817).

Almost surely, 2^11921633 is an apocalyptic number.

It is an amenable number.

11921633 is a deficient number, since it is larger than the sum of its proper divisors (1).

11921633 is an equidigital number, since it uses as much as digits as its factorization.

11921633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

The square root of 11921633 is about 3452.7717851025. The cubic root of 11921633 is about 228.4433828767.

The spelling of 11921633 in words is "eleven million, nine hundred twenty-one thousand, six hundred thirty-three".