54785777 has 2 divisors, whose sum is σ = 54785778. Its totient is φ = 54785776.

The previous prime is 54785771. The next prime is 54785779. The reversal of 54785777 is 77758745.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48455521 + 6330256 = 6961^2 + 2516^2 .

It is a cyclic number.

It is not a de Polignac number, because 54785777 - 2⁴ = 54785761 is a prime.

It is a super-2 number, since 2×54785777² = 6002962722987458, which contains 22 as substring.

Together with 54785779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54785771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27392888 + 27392889.

It is an arithmetic number, because the mean of its divisors is an integer number (27392889).

Almost surely, 2^54785777 is an apocalyptic number.

It is an amenable number.

54785777 is a deficient number, since it is larger than the sum of its proper divisors (1).

54785777 is an equidigital number, since it uses as much as digits as its factorization.

54785777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920800, while the sum is 50.

The square root of 54785777 is about 7401.7414842725. The cubic root of 54785777 is about 379.8008582604.

The spelling of 54785777 in words is "fifty-four million, seven hundred eighty-five thousand, seven hundred seventy-seven".