11521799 has 2 divisors, whose sum is σ = 11521800. Its totient is φ = 11521798.

The previous prime is 11521793. The next prime is 11521813. The reversal of 11521799 is 99712511.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11521799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11521793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760899 + 5760900.

It is an arithmetic number, because the mean of its divisors is an integer number (5760900).

Almost surely, 2^11521799 is an apocalyptic number.

11521799 is a deficient number, since it is larger than the sum of its proper divisors (1).

11521799 is an equidigital number, since it uses as much as digits as its factorization.

11521799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 35.

The square root of 11521799 is about 3394.3775570788. The cubic root of 11521799 is about 225.8604027349.

The spelling of 11521799 in words is "eleven million, five hundred twenty-one thousand, seven hundred ninety-nine".