4049569 has 2 divisors, whose sum is σ = 4049570. Its totient is φ = 4049568.

The previous prime is 4049543. The next prime is 4049579. The reversal of 4049569 is 9659404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3610000 + 439569 = 1900^2 + 663^2 .

It is a cyclic number.

It is not a de Polignac number, because 4049569 - 2⁵ = 4049537 is a prime.

It is a super-2 number, since 2×4049569² = 32798018171522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4049579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2024784 + 2024785.

It is an arithmetic number, because the mean of its divisors is an integer number (2024785).

Almost surely, 2^4049569 is an apocalyptic number.

It is an amenable number.

4049569 is a deficient number, since it is larger than the sum of its proper divisors (1).

4049569 is an equidigital number, since it uses as much as digits as its factorization.

4049569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 4049569 is about 2012.3540940898. The cubic root of 4049569 is about 159.3931307837.

The spelling of 4049569 in words is "four million, forty-nine thousand, five hundred sixty-nine".