55717829 has 2 divisors, whose sum is σ = 55717830. Its totient is φ = 55717828.

The previous prime is 55717807. The next prime is 55717847. The reversal of 55717829 is 92871755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43256929 + 12460900 = 6577^2 + 3530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55717829 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55717829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55717229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27858914 + 27858915.

It is an arithmetic number, because the mean of its divisors is an integer number (27858915).

Almost surely, 2^55717829 is an apocalyptic number.

It is an amenable number.

55717829 is a deficient number, since it is larger than the sum of its proper divisors (1).

55717829 is an equidigital number, since it uses as much as digits as its factorization.

55717829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 176400, while the sum is 44.

The square root of 55717829 is about 7464.4376211474. The cubic root of 55717829 is about 381.9425664958.

The spelling of 55717829 in words is "fifty-five million, seven hundred seventeen thousand, eight hundred twenty-nine".