556673149 has 2 divisors, whose sum is σ = 556673150. Its totient is φ = 556673148.

The previous prime is 556673147. The next prime is 556673179. The reversal of 556673149 is 941376655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 534441924 + 22231225 = 23118^2 + 4715^2 .

It is a cyclic number.

It is not a de Polignac number, because 556673149 - 2¹ = 556673147 is a prime.

Together with 556673147, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 556673099 and 556673108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556673147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278336574 + 278336575.

It is an arithmetic number, because the mean of its divisors is an integer number (278336575).

Almost surely, 2^556673149 is an apocalyptic number.

It is an amenable number.

556673149 is a deficient number, since it is larger than the sum of its proper divisors (1).

556673149 is an equidigital number, since it uses as much as digits as its factorization.

556673149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 46.

The square root of 556673149 is about 23593.9218655992. The cubic root of 556673149 is about 822.6215667051.

The spelling of 556673149 in words is "five hundred fifty-six million, six hundred seventy-three thousand, one hundred forty-nine".