2904812161 has 2 divisors, whose sum is σ = 2904812162. Its totient is φ = 2904812160.

The previous prime is 2904812159. The next prime is 2904812167. The reversal of 2904812161 is 1612184092.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1569348225 + 1335463936 = 39615^2 + 36544^2 .

It is a cyclic number.

It is not a de Polignac number, because 2904812161 - 2¹ = 2904812159 is a prime.

Together with 2904812159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2904812167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1452406080 + 1452406081.

It is an arithmetic number, because the mean of its divisors is an integer number (1452406081).

Almost surely, 2^2904812161 is an apocalyptic number.

It is an amenable number.

2904812161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2904812161 is an equidigital number, since it uses as much as digits as its factorization.

2904812161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 2904812161 is about 53896.3093448893. The cubic root of 2904812161 is about 1426.8314870270.

It can be divided in two parts, 29048 and 12161, that added together give a square (41209 = 203²).

The spelling of 2904812161 in words is "two billion, nine hundred four million, eight hundred twelve thousand, one hundred sixty-one".