55439347 has 2 divisors, whose sum is σ = 55439348. Its totient is φ = 55439346.

The previous prime is 55439323. The next prime is 55439353. The reversal of 55439347 is 74393455.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55439347 is a prime.

It is not a weakly prime, because it can be changed into another prime (55439317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27719673 + 27719674.

It is an arithmetic number, because the mean of its divisors is an integer number (27719674).

Almost surely, 2^55439347 is an apocalyptic number.

55439347 is a deficient number, since it is larger than the sum of its proper divisors (1).

55439347 is an equidigital number, since it uses as much as digits as its factorization.

55439347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 40.

The square root of 55439347 is about 7445.7603372658. The cubic root of 55439347 is about 381.3051772867.

The spelling of 55439347 in words is "fifty-five million, four hundred thirty-nine thousand, three hundred forty-seven".