55039977 has 12 divisors (see below), whose sum is σ = 79581060. Its totient is φ = 36656928.

The previous prime is 55039967. The next prime is 55039987. The reversal of 55039977 is 77993055.

It is a happy number.

55039977 is a `hidden beast` number, since 550 + 3 + 9 + 97 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (55039967) and next prime (55039987).

It can be written as a sum of positive squares in 2 ways, for example, as 17842176 + 37197801 = 4224^2 + 6099^2 .

It is not a de Polignac number, because 55039977 - 2⁶ = 55039913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55039937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9099 + ... + 13887.

It is an arithmetic number, because the mean of its divisors is an integer number (6631755).

Almost surely, 2^55039977 is an apocalyptic number.

It is an amenable number.

55039977 is a deficient number, since it is larger than the sum of its proper divisors (24541083).

55039977 is a wasteful number, since it uses less digits than its factorization.

55039977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072 (or 6069 counting only the distinct ones).

The product of its (nonzero) digits is 297675, while the sum is 45.

The square root of 55039977 is about 7418.8932463003. The cubic root of 55039977 is about 380.3873635372.

The spelling of 55039977 in words is "fifty-five million, thirty-nine thousand, nine hundred seventy-seven".