55405949 has 2 divisors, whose sum is σ = 55405950. Its totient is φ = 55405948.

The previous prime is 55405943. The next prime is 55405963. The reversal of 55405949 is 94950455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54493924 + 912025 = 7382^2 + 955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55405949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55405943) 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, 27702974 + 27702975.

It is an arithmetic number, because the mean of its divisors is an integer number (27702975).

Almost surely, 2^55405949 is an apocalyptic number.

It is an amenable number.

55405949 is a deficient number, since it is larger than the sum of its proper divisors (1).

55405949 is an equidigital number, since it uses as much as digits as its factorization.

55405949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 55405949 is about 7443.5172465710. The cubic root of 55405949 is about 381.2285927602.

The spelling of 55405949 in words is "fifty-five million, four hundred five thousand, nine hundred forty-nine".