55590907 has 2 divisors, whose sum is σ = 55590908. Its totient is φ = 55590906.

The previous prime is 55590893. The next prime is 55590911. The reversal of 55590907 is 70909555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55590907 is a prime.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 55590907.

It is not a weakly prime, because it can be changed into another prime (55590107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27795453 + 27795454.

It is an arithmetic number, because the mean of its divisors is an integer number (27795454).

Almost surely, 2^55590907 is an apocalyptic number.

55590907 is a deficient number, since it is larger than the sum of its proper divisors (1).

55590907 is an equidigital number, since it uses as much as digits as its factorization.

55590907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70875, while the sum is 40.

The square root of 55590907 is about 7455.9309948524. The cubic root of 55590907 is about 381.6523316275.

The spelling of 55590907 in words is "fifty-five million, five hundred ninety thousand, nine hundred seven".