11651993 has 2 divisors, whose sum is σ = 11651994. Its totient is φ = 11651992.

The previous prime is 11651977. The next prime is 11652013. The reversal of 11651993 is 39915611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6512704 + 5139289 = 2552^2 + 2267^2 .

It is an emirp because it is prime and its reverse (39915611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11651993 - 2⁴ = 11651977 is a prime.

It is not a weakly prime, because it can be changed into another prime (11651923) 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, 5825996 + 5825997.

It is an arithmetic number, because the mean of its divisors is an integer number (5825997).

Almost surely, 2^11651993 is an apocalyptic number.

It is an amenable number.

11651993 is a deficient number, since it is larger than the sum of its proper divisors (1).

11651993 is an equidigital number, since it uses as much as digits as its factorization.

11651993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7290, while the sum is 35.

The square root of 11651993 is about 3413.5015746298. The cubic root of 11651993 is about 226.7079439917.

The spelling of 11651993 in words is "eleven million, six hundred fifty-one thousand, nine hundred ninety-three".