4145023409 has 2 divisors, whose sum is σ = 4145023410. Its totient is φ = 4145023408.

The previous prime is 4145023397. The next prime is 4145023529. The reversal of 4145023409 is 9043205414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3936307600 + 208715809 = 62740^2 + 14447^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4145023409 is a prime.

It is a super-2 number, since 2×4145023409² = 34362438122315962562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4145023009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2072511704 + 2072511705.

It is an arithmetic number, because the mean of its divisors is an integer number (2072511705).

Almost surely, 2^4145023409 is an apocalyptic number.

It is an amenable number.

4145023409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4145023409 is an equidigital number, since it uses as much as digits as its factorization.

4145023409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 4145023409 is about 64381.8562096496. The cubic root of 4145023409 is about 1606.3579581453.

The spelling of 4145023409 in words is "four billion, one hundred forty-five million, twenty-three thousand, four hundred nine".