2898121691 has 2 divisors, whose sum is σ = 2898121692. Its totient is φ = 2898121690.

The previous prime is 2898121679. The next prime is 2898121703. The reversal of 2898121691 is 1961218982.

It is a balanced prime because it is at equal distance from previous prime (2898121679) and next prime (2898121703).

It is a cyclic number.

It is not a de Polignac number, because 2898121691 - 2²⁶ = 2831012827 is a prime.

It is not a weakly prime, because it can be changed into another prime (2898121591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1449060845 + 1449060846.

It is an arithmetic number, because the mean of its divisors is an integer number (1449060846).

Almost surely, 2^2898121691 is an apocalyptic number.

2898121691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2898121691 is an equidigital number, since it uses as much as digits as its factorization.

2898121691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 47.

The square root of 2898121691 is about 53834.2055852968. The cubic root of 2898121691 is about 1425.7352013748.

The spelling of 2898121691 in words is "two billion, eight hundred ninety-eight million, one hundred twenty-one thousand, six hundred ninety-one".