10777991 has 6 divisors (see below), whose sum is σ = 12537720. Its totient is φ = 9238236.

The previous prime is 10777973. The next prime is 10777999. The reversal of 10777991 is 19977701.

10777991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10777991 - 2¹⁸ = 10515847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10777999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109931 + ... + 110028.

It is an arithmetic number, because the mean of its divisors is an integer number (2089620).

Almost surely, 2^10777991 is an apocalyptic number.

10777991 is a deficient number, since it is larger than the sum of its proper divisors (1759729).

10777991 is an equidigital number, since it uses as much as digits as its factorization.

10777991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219973 (or 219966 counting only the distinct ones).

The product of its (nonzero) digits is 27783, while the sum is 41.

The square root of 10777991 is about 3282.9850745929. The cubic root of 10777991 is about 220.8916362336.

The spelling of 10777991 in words is "ten million, seven hundred seventy-seven thousand, nine hundred ninety-one".