10771991 has 2 divisors, whose sum is σ = 10771992. Its totient is φ = 10771990.

The previous prime is 10771949. The next prime is 10771997. The reversal of 10771991 is 19917701.

It is a happy number.

10771991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10771991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10771997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5385995 + 5385996.

It is an arithmetic number, because the mean of its divisors is an integer number (5385996).

Almost surely, 2^10771991 is an apocalyptic number.

10771991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10771991 is an equidigital number, since it uses as much as digits as its factorization.

10771991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 35.

The square root of 10771991 is about 3282.0711448718. The cubic root of 10771991 is about 220.8506392355.

The spelling of 10771991 in words is "ten million, seven hundred seventy-one thousand, nine hundred ninety-one".