55543687 has 2 divisors, whose sum is σ = 55543688. Its totient is φ = 55543686.

The previous prime is 55543673. The next prime is 55543703. The reversal of 55543687 is 78634555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55543687 - 2¹⁵ = 55510919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55543627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27771843 + 27771844.

It is an arithmetic number, because the mean of its divisors is an integer number (27771844).

Almost surely, 2^55543687 is an apocalyptic number.

55543687 is a deficient number, since it is larger than the sum of its proper divisors (1).

55543687 is an equidigital number, since it uses as much as digits as its factorization.

55543687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504000, while the sum is 43.

The square root of 55543687 is about 7452.7637155622. The cubic root of 55543687 is about 381.5442400401.

The spelling of 55543687 in words is "fifty-five million, five hundred forty-three thousand, six hundred eighty-seven".