4213661509 has 2 divisors, whose sum is σ = 4213661510. Its totient is φ = 4213661508.

The previous prime is 4213661503. The next prime is 4213661527. The reversal of 4213661509 is 9051663124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3800352609 + 413308900 = 61647^2 + 20330^2 .

It is a cyclic number.

It is not a de Polignac number, because 4213661509 - 2⁵ = 4213661477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4213661503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2106830754 + 2106830755.

It is an arithmetic number, because the mean of its divisors is an integer number (2106830755).

Almost surely, 2^4213661509 is an apocalyptic number.

It is an amenable number.

4213661509 is a deficient number, since it is larger than the sum of its proper divisors (1).

4213661509 is an equidigital number, since it uses as much as digits as its factorization.

4213661509 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 4213661509 is about 64912.7222430241. The cubic root of 4213661509 is about 1615.1761074719.

The spelling of 4213661509 in words is "four billion, two hundred thirteen million, six hundred sixty-one thousand, five hundred nine".