55591007 has 2 divisors, whose sum is σ = 55591008. Its totient is φ = 55591006.

The previous prime is 55590961. The next prime is 55591027. The reversal of 55591007 is 70019555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55591007 - 2¹² = 55586911 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55591027) 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, 27795503 + 27795504.

It is an arithmetic number, because the mean of its divisors is an integer number (27795504).

Almost surely, 2^55591007 is an apocalyptic number.

55591007 is a deficient number, since it is larger than the sum of its proper divisors (1).

55591007 is an equidigital number, since it uses as much as digits as its factorization.

55591007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7875, while the sum is 32.

The square root of 55591007 is about 7455.9377009200. The cubic root of 55591007 is about 381.6525604731.

The spelling of 55591007 in words is "fifty-five million, five hundred ninety-one thousand, seven".