2945869 has 2 divisors, whose sum is σ = 2945870. Its totient is φ = 2945868.

The previous prime is 2945857. The next prime is 2945933. The reversal of 2945869 is 9685492.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1790244 + 1155625 = 1338^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 2945869 - 2¹¹ = 2943821 is a prime.

It is a super-2 number, since 2×2945869² = 17356288330322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2945069) 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, 1472934 + 1472935.

It is an arithmetic number, because the mean of its divisors is an integer number (1472935).

2^2945869 is an apocalyptic number.

It is an amenable number.

2945869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2945869 is an equidigital number, since it uses as much as digits as its factorization.

2945869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 2945869 is about 1716.3534018377. The cubic root of 2945869 is about 143.3522377565.

The spelling of 2945869 in words is "two million, nine hundred forty-five thousand, eight hundred sixty-nine".