55847997 has 12 divisors (see below), whose sum is σ = 83451420. Its totient is φ = 35947968.

The previous prime is 55847983. The next prime is 55847999. The reversal of 55847997 is 79974855.

55847997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 26101881 + 29746116 = 5109^2 + 5454^2 .

It is not a de Polignac number, because 55847997 - 2⁸ = 55847741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55847999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106728 + ... + 107249.

It is an arithmetic number, because the mean of its divisors is an integer number (6954285).

Almost surely, 2^55847997 is an apocalyptic number.

It is an amenable number.

55847997 is a deficient number, since it is larger than the sum of its proper divisors (27603423).

55847997 is a wasteful number, since it uses less digits than its factorization.

55847997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214012 (or 214009 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 54.

The square root of 55847997 is about 7473.1517447460. The cubic root of 55847997 is about 382.2397666021.

The spelling of 55847997 in words is "fifty-five million, eight hundred forty-seven thousand, nine hundred ninety-seven".