4091223809 has 2 divisors, whose sum is σ = 4091223810. Its totient is φ = 4091223808.

The previous prime is 4091223751. The next prime is 4091223869. The reversal of 4091223809 is 9083221904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4088323600 + 2900209 = 63940^2 + 1703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4091223809 is a prime.

It is a super-2 number, since 2×4091223809² = 33476224510656936962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4091223869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2045611904 + 2045611905.

It is an arithmetic number, because the mean of its divisors is an integer number (2045611905).

Almost surely, 2^4091223809 is an apocalyptic number.

It is an amenable number.

4091223809 is a deficient number, since it is larger than the sum of its proper divisors (1).

4091223809 is an equidigital number, since it uses as much as digits as its factorization.

4091223809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 4091223809 is about 63962.6751238564. The cubic root of 4091223809 is about 1599.3778582488.

The spelling of 4091223809 in words is "four billion, ninety-one million, two hundred twenty-three thousand, eight hundred nine".