611878249 has 2 divisors, whose sum is σ = 611878250. Its totient is φ = 611878248.

The previous prime is 611878207. The next prime is 611878259. The reversal of 611878249 is 942878116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345960000 + 265918249 = 18600^2 + 16307^2 .

It is a cyclic number.

It is not a de Polignac number, because 611878249 - 2⁹ = 611877737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 611878199 and 611878208.

It is not a weakly prime, because it can be changed into another prime (611878259) 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, 305939124 + 305939125.

It is an arithmetic number, because the mean of its divisors is an integer number (305939125).

Almost surely, 2^611878249 is an apocalyptic number.

It is an amenable number.

611878249 is a deficient number, since it is larger than the sum of its proper divisors (1).

611878249 is an equidigital number, since it uses as much as digits as its factorization.

611878249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 46.

The square root of 611878249 is about 24736.1728850685. The cubic root of 611878249 is about 848.9621700280.

The spelling of 611878249 in words is "six hundred eleven million, eight hundred seventy-eight thousand, two hundred forty-nine".