55607917 has 2 divisors, whose sum is σ = 55607918. Its totient is φ = 55607916.

The previous prime is 55607899. The next prime is 55607941. The reversal of 55607917 is 71970655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47734281 + 7873636 = 6909^2 + 2806^2 .

It is a cyclic number.

It is not a de Polignac number, because 55607917 - 2¹⁹ = 55083629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55607917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55607117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27803958 + 27803959.

It is an arithmetic number, because the mean of its divisors is an integer number (27803959).

Almost surely, 2^55607917 is an apocalyptic number.

It is an amenable number.

55607917 is a deficient number, since it is larger than the sum of its proper divisors (1).

55607917 is an equidigital number, since it uses as much as digits as its factorization.

55607917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66150, while the sum is 40.

The square root of 55607917 is about 7457.0716102234. The cubic root of 55607917 is about 381.6912543247.

The spelling of 55607917 in words is "fifty-five million, six hundred seven thousand, nine hundred seventeen".