2809392961 has 4 divisors (see below), whose sum is σ = 2809660500. Its totient is φ = 2809125424.

The previous prime is 2809392947. The next prime is 2809392967. The reversal of 2809392961 is 1692939082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 430977600 + 2378415361 = 20760^2 + 48769^2 .

It is a cyclic number.

It is not a de Polignac number, because 2809392961 - 2⁹ = 2809392449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2809392967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117346 + ... + 139243.

It is an arithmetic number, because the mean of its divisors is an integer number (702415125).

Almost surely, 2^2809392961 is an apocalyptic number.

It is an amenable number.

2809392961 is a deficient number, since it is larger than the sum of its proper divisors (267539).

2809392961 is a wasteful number, since it uses less digits than its factorization.

2809392961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267538.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 2809392961 is about 53003.7070496017. The cubic root of 2809392961 is about 1411.0340587915.

The spelling of 2809392961 in words is "two billion, eight hundred nine million, three hundred ninety-two thousand, nine hundred sixty-one".