1945228469 has 2 divisors, whose sum is σ = 1945228470. Its totient is φ = 1945228468.

The previous prime is 1945228463. The next prime is 1945228489. The reversal of 1945228469 is 9648225491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1809226225 + 136002244 = 42535^2 + 11662^2 .

It is a cyclic number.

It is not a de Polignac number, because 1945228469 - 2²⁰ = 1944179893 is a prime.

It is a super-2 number, since 2×1945228469² = 7567827593216167922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1945228463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972614234 + 972614235.

It is an arithmetic number, because the mean of its divisors is an integer number (972614235).

Almost surely, 2^1945228469 is an apocalyptic number.

It is an amenable number.

1945228469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945228469 is an equidigital number, since it uses as much as digits as its factorization.

1945228469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 50.

The square root of 1945228469 is about 44104.7442912891. The cubic root of 1945228469 is about 1248.3131313233.

The spelling of 1945228469 in words is "one billion, nine hundred forty-five million, two hundred twenty-eight thousand, four hundred sixty-nine".