54991777 has 2 divisors, whose sum is σ = 54991778. Its totient is φ = 54991776.

The previous prime is 54991771. The next prime is 54991813. The reversal of 54991777 is 77719945.

54991777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51609856 + 3381921 = 7184^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 54991777 - 2¹⁹ = 54467489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54991777.

It is not a weakly prime, because it can be changed into another prime (54991771) 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, 27495888 + 27495889.

It is an arithmetic number, because the mean of its divisors is an integer number (27495889).

Almost surely, 2^54991777 is an apocalyptic number.

It is an amenable number.

54991777 is a deficient number, since it is larger than the sum of its proper divisors (1).

54991777 is an equidigital number, since it uses as much as digits as its factorization.

54991777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 555660, while the sum is 49.

The square root of 54991777 is about 7415.6440718255. The cubic root of 54991777 is about 380.2762925994.

The spelling of 54991777 in words is "fifty-four million, nine hundred ninety-one thousand, seven hundred seventy-seven".