55997477 has 2 divisors, whose sum is σ = 55997478. Its totient is φ = 55997476.

The previous prime is 55997471. The next prime is 55997519. The reversal of 55997477 is 77479955.

55997477 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., 33709636 + 22287841 = 5806^2 + 4721^2 .

It is a cyclic number.

It is not a de Polignac number, because 55997477 - 2⁶ = 55997413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55997471) 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, 27998738 + 27998739.

It is an arithmetic number, because the mean of its divisors is an integer number (27998739).

Almost surely, 2^55997477 is an apocalyptic number.

It is an amenable number.

55997477 is a deficient number, since it is larger than the sum of its proper divisors (1).

55997477 is an equidigital number, since it uses as much as digits as its factorization.

55997477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2778300, while the sum is 53.

The square root of 55997477 is about 7483.1461966208. The cubic root of 55997477 is about 382.5804908427.

The spelling of 55997477 in words is "fifty-five million, nine hundred ninety-seven thousand, four hundred seventy-seven".