548621387 has 2 divisors, whose sum is σ = 548621388. Its totient is φ = 548621386.

The previous prime is 548621383. The next prime is 548621413. The reversal of 548621387 is 783126845.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 548621387 - 2² = 548621383 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (548621383) 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 as a sum of consecutive naturals, namely, 274310693 + 274310694.

It is an arithmetic number, because the mean of its divisors is an integer number (274310694).

Almost surely, 2^548621387 is an apocalyptic number.

548621387 is a deficient number, since it is larger than the sum of its proper divisors (1).

548621387 is an equidigital number, since it uses as much as digits as its factorization.

548621387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 44.

The square root of 548621387 is about 23422.6682297299. The cubic root of 548621387 is about 818.6361360449.

The spelling of 548621387 in words is "five hundred forty-eight million, six hundred twenty-one thousand, three hundred eighty-seven".