54820397 has 2 divisors, whose sum is σ = 54820398. Its totient is φ = 54820396.

The previous prime is 54820379. The next prime is 54820417. The reversal of 54820397 is 79302845.

Together with previous prime (54820379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47141956 + 7678441 = 6866^2 + 2771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54820397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54820397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54840397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27410198 + 27410199.

It is an arithmetic number, because the mean of its divisors is an integer number (27410199).

Almost surely, 2^54820397 is an apocalyptic number.

It is an amenable number.

54820397 is a deficient number, since it is larger than the sum of its proper divisors (1).

54820397 is an equidigital number, since it uses as much as digits as its factorization.

54820397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 54820397 is about 7404.0797537574. The cubic root of 54820397 is about 379.8808421406.

The spelling of 54820397 in words is "fifty-four million, eight hundred twenty thousand, three hundred ninety-seven".