55723777 has 4 divisors (see below), whose sum is σ = 55754820. Its totient is φ = 55692736.

The previous prime is 55723769. The next prime is 55723799. The reversal of 55723777 is 77732755.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32307856 + 23415921 = 5684^2 + 4839^2 .

It is a cyclic number.

It is not a de Polignac number, because 55723777 - 2³ = 55723769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55723177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12652 + ... + 16477.

It is an arithmetic number, because the mean of its divisors is an integer number (13938705).

Almost surely, 2^55723777 is an apocalyptic number.

It is an amenable number.

55723777 is a deficient number, since it is larger than the sum of its proper divisors (31043).

55723777 is a wasteful number, since it uses less digits than its factorization.

55723777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31042.

The product of its digits is 360150, while the sum is 43.

The square root of 55723777 is about 7464.8360330285. The cubic root of 55723777 is about 381.9561570800.

The spelling of 55723777 in words is "fifty-five million, seven hundred twenty-three thousand, seven hundred seventy-seven".