55717847 has 2 divisors, whose sum is σ = 55717848. Its totient is φ = 55717846.

The previous prime is 55717829. The next prime is 55717853. The reversal of 55717847 is 74871755.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55717847 - 2²⁰ = 54669271 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55717798 and 55717807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55717807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27858923 + 27858924.

It is an arithmetic number, because the mean of its divisors is an integer number (27858924).

Almost surely, 2^55717847 is an apocalyptic number.

55717847 is a deficient number, since it is larger than the sum of its proper divisors (1).

55717847 is an equidigital number, since it uses as much as digits as its factorization.

55717847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 274400, while the sum is 44.

The square root of 55717847 is about 7464.4388268643. The cubic root of 55717847 is about 381.9426076254.

The spelling of 55717847 in words is "fifty-five million, seven hundred seventeen thousand, eight hundred forty-seven".