55349993 has 2 divisors, whose sum is σ = 55349994. Its totient is φ = 55349992.

The previous prime is 55349971. The next prime is 55350013. The reversal of 55349993 is 39994355.

55349993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28858384 + 26491609 = 5372^2 + 5147^2 .

It is a cyclic number.

It is not a de Polignac number, because 55349993 - 2⁶ = 55349929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55349933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27674996 + 27674997.

It is an arithmetic number, because the mean of its divisors is an integer number (27674997).

Almost surely, 2^55349993 is an apocalyptic number.

It is an amenable number.

55349993 is a deficient number, since it is larger than the sum of its proper divisors (1).

55349993 is an equidigital number, since it uses as much as digits as its factorization.

55349993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 656100, while the sum is 47.

The square root of 55349993 is about 7439.7575901369. The cubic root of 55349993 is about 381.1002117661.

The spelling of 55349993 in words is "fifty-five million, three hundred forty-nine thousand, nine hundred ninety-three".