55690373 has 2 divisors, whose sum is σ = 55690374. Its totient is φ = 55690372.

The previous prime is 55690367. The next prime is 55690447. The reversal of 55690373 is 37309655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50951044 + 4739329 = 7138^2 + 2177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55690373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55690073) 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, 27845186 + 27845187.

It is an arithmetic number, because the mean of its divisors is an integer number (27845187).

Almost surely, 2^55690373 is an apocalyptic number.

It is an amenable number.

55690373 is a deficient number, since it is larger than the sum of its proper divisors (1).

55690373 is an equidigital number, since it uses as much as digits as its factorization.

55690373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 85050, while the sum is 38.

The square root of 55690373 is about 7462.5982740598. The cubic root of 55690373 is about 381.8798197457.

The spelling of 55690373 in words is "fifty-five million, six hundred ninety thousand, three hundred seventy-three".