11991373 has 2 divisors, whose sum is σ = 11991374. Its totient is φ = 11991372.

The previous prime is 11991313. The next prime is 11991377. The reversal of 11991373 is 37319911.

11991373 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11985444 + 5929 = 3462^2 + 77^2 .

It is a cyclic number.

It is not a de Polignac number, because 11991373 - 2⁹ = 11990861 is a prime.

It is equal to p₇₈₇₅₅₂ and since 11991373 and 787552 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11991377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5995686 + 5995687.

It is an arithmetic number, because the mean of its divisors is an integer number (5995687).

Almost surely, 2^11991373 is an apocalyptic number.

It is an amenable number.

11991373 is a deficient number, since it is larger than the sum of its proper divisors (1).

11991373 is an equidigital number, since it uses as much as digits as its factorization.

11991373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5103, while the sum is 34.

The square root of 11991373 is about 3462.8561910654. The cubic root of 11991373 is about 228.8879717481.

The spelling of 11991373 in words is "eleven million, nine hundred ninety-one thousand, three hundred seventy-three".