554243861 has 2 divisors, whose sum is σ = 554243862. Its totient is φ = 554243860.

The previous prime is 554243849. The next prime is 554243923. The reversal of 554243861 is 168342455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 514427761 + 39816100 = 22681^2 + 6310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-554243861 is a prime.

It is a super-5 number, since 5×554243861⁵ (a number of 45 digits) contains 55555 as substring.

It is equal to p_29056547 and since 554243861 and 29056547 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (554243561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277121930 + 277121931.

It is an arithmetic number, because the mean of its divisors is an integer number (277121931).

Almost surely, 2^554243861 is an apocalyptic number.

It is an amenable number.

554243861 is a deficient number, since it is larger than the sum of its proper divisors (1).

554243861 is an equidigital number, since it uses as much as digits as its factorization.

554243861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 38.

The square root of 554243861 is about 23542.3843524822. The cubic root of 554243861 is about 821.4231981976.

The spelling of 554243861 in words is "five hundred fifty-four million, two hundred forty-three thousand, eight hundred sixty-one".