55555393 has 2 divisors, whose sum is σ = 55555394. Its totient is φ = 55555392.

The previous prime is 55555391. The next prime is 55555399. The reversal of 55555393 is 39355555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49660209 + 5895184 = 7047^2 + 2428^2 .

It is a cyclic number.

It is not a de Polignac number, because 55555393 - 2¹ = 55555391 is a prime.

It is a super-3 number, since 3×55555393³ (a number of 24 digits) contains 333 as substring.

Together with 55555391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55555391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777696 + 27777697.

It is an arithmetic number, because the mean of its divisors is an integer number (27777697).

Almost surely, 2^55555393 is an apocalyptic number.

It is an amenable number.

55555393 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555393 is an equidigital number, since it uses as much as digits as its factorization.

55555393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 253125, while the sum is 40.

The square root of 55555393 is about 7453.5490204332. The cubic root of 55555393 is about 381.5710420248.

The spelling of 55555393 in words is "fifty-five million, five hundred fifty-five thousand, three hundred ninety-three".