55405963 has 2 divisors, whose sum is σ = 55405964. Its totient is φ = 55405962.

The previous prime is 55405949. The next prime is 55405969. The reversal of 55405963 is 36950455.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55405963 is a prime.

It is not a weakly prime, because it can be changed into another prime (55405969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27702981 + 27702982.

It is an arithmetic number, because the mean of its divisors is an integer number (27702982).

Almost surely, 2^55405963 is an apocalyptic number.

55405963 is a deficient number, since it is larger than the sum of its proper divisors (1).

55405963 is an equidigital number, since it uses as much as digits as its factorization.

55405963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 55405963 is about 7443.5181869866. The cubic root of 55405963 is about 381.2286248699.

The spelling of 55405963 in words is "fifty-five million, four hundred five thousand, nine hundred sixty-three".