55539403 has 2 divisors, whose sum is σ = 55539404. Its totient is φ = 55539402.

The previous prime is 55539397. The next prime is 55539427. The reversal of 55539403 is 30493555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55539403 - 2⁵ = 55539371 is a prime.

It is not a weakly prime, because it can be changed into another prime (55539443) 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, 27769701 + 27769702.

It is an arithmetic number, because the mean of its divisors is an integer number (27769702).

Almost surely, 2^55539403 is an apocalyptic number.

55539403 is a deficient number, since it is larger than the sum of its proper divisors (1).

55539403 is an equidigital number, since it uses as much as digits as its factorization.

55539403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 34.

The square root of 55539403 is about 7452.4762998617. The cubic root of 55539403 is about 381.5344304791.

The spelling of 55539403 in words is "fifty-five million, five hundred thirty-nine thousand, four hundred three".