55487647 has 2 divisors, whose sum is σ = 55487648. Its totient is φ = 55487646.

The previous prime is 55487629. The next prime is 55487659. The reversal of 55487647 is 74678455.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55487647 - 2¹⁵ = 55454879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55487597 and 55487606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55487147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27743823 + 27743824.

It is an arithmetic number, because the mean of its divisors is an integer number (27743824).

Almost surely, 2^55487647 is an apocalyptic number.

55487647 is a deficient number, since it is larger than the sum of its proper divisors (1).

55487647 is an equidigital number, since it uses as much as digits as its factorization.

55487647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 940800, while the sum is 46.

The square root of 55487647 is about 7449.0030876621. The cubic root of 55487647 is about 381.4158790127.

Subtracting from 55487647 its sum of digits (46), we obtain a square (55487601 = 7449²).

The spelling of 55487647 in words is "fifty-five million, four hundred eighty-seven thousand, six hundred forty-seven".