55917647 has 4 divisors (see below), whose sum is σ = 56015136. Its totient is φ = 55820160.

The previous prime is 55917637. The next prime is 55917649. The reversal of 55917647 is 74671955.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55917647 - 2⁸ = 55917391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55917598 and 55917607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55917649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47879 + ... + 49032.

It is an arithmetic number, because the mean of its divisors is an integer number (14003784).

Almost surely, 2^55917647 is an apocalyptic number.

55917647 is a deficient number, since it is larger than the sum of its proper divisors (97489).

55917647 is an equidigital number, since it uses as much as digits as its factorization.

55917647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97488.

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

The square root of 55917647 is about 7477.8103078374. The cubic root of 55917647 is about 382.3986021399.

The spelling of 55917647 in words is "fifty-five million, nine hundred seventeen thousand, six hundred forty-seven".