9141947209 has 2 divisors, whose sum is σ = 9141947210. Its totient is φ = 9141947208.

The previous prime is 9141947197. The next prime is 9141947237. The reversal of 9141947209 is 9027491419.

9141947209 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4766521600 + 4375425609 = 69040^2 + 66147^2 .

It is a cyclic number.

It is not a de Polignac number, because 9141947209 - 2²⁷ = 9007729481 is a prime.

It is not a weakly prime, because it can be changed into another prime (9141947239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4570973604 + 4570973605.

It is an arithmetic number, because the mean of its divisors is an integer number (4570973605).

Almost surely, 2^9141947209 is an apocalyptic number.

It is an amenable number.

9141947209 is a deficient number, since it is larger than the sum of its proper divisors (1).

9141947209 is an equidigital number, since it uses as much as digits as its factorization.

9141947209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 9141947209 is about 95613.5304703262. The cubic root of 9141947209 is about 2090.9624627024.

It can be divided in two parts, 914194 and 7209, that added together give a triangular number (921403 = T₁₃₅₇).

The spelling of 9141947209 in words is "nine billion, one hundred forty-one million, nine hundred forty-seven thousand, two hundred nine".