2809430947 has 2 divisors, whose sum is σ = 2809430948. Its totient is φ = 2809430946.

The previous prime is 2809430917. The next prime is 2809430951. The reversal of 2809430947 is 7490349082.

It is a happy number.

2809430947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2809430947 - 2¹¹ = 2809428899 is a prime.

It is a super-2 number, since 2×2809430947² = 15785804491922633618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2809430897 and 2809430906.

It is not a weakly prime, because it can be changed into another prime (2809430917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1404715473 + 1404715474.

It is an arithmetic number, because the mean of its divisors is an integer number (1404715474).

Almost surely, 2^2809430947 is an apocalyptic number.

2809430947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2809430947 is an equidigital number, since it uses as much as digits as its factorization.

2809430947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 2809430947 is about 53004.0653818176. The cubic root of 2809430947 is about 1411.0404183264.

The spelling of 2809430947 in words is "two billion, eight hundred nine million, four hundred thirty thousand, nine hundred forty-seven".