55647917 has 8 divisors (see below), whose sum is σ = 60005400. Its totient is φ = 51301440.

The previous prime is 55647901. The next prime is 55647923. The reversal of 55647917 is 71974655.

It can be written as a sum of positive squares in 4 ways, for example, as 7678441 + 47969476 = 2771^2 + 6926^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55647917 - 2⁴ = 55647901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55647017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9959 + ... + 14507.

It is an arithmetic number, because the mean of its divisors is an integer number (7500675).

Almost surely, 2^55647917 is an apocalyptic number.

It is an amenable number.

55647917 is a deficient number, since it is larger than the sum of its proper divisors (4357483).

55647917 is a wasteful number, since it uses less digits than its factorization.

55647917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503.

The product of its digits is 264600, while the sum is 44.

The square root of 55647917 is about 7459.7531460498. The cubic root of 55647917 is about 381.7827520327.

The spelling of 55647917 in words is "fifty-five million, six hundred forty-seven thousand, nine hundred seventeen".