2989691 has 2 divisors, whose sum is σ = 2989692. Its totient is φ = 2989690.

The previous prime is 2989673. The next prime is 2989757. The reversal of 2989691 is 1969892.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2989691 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2989621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1494845 + 1494846.

It is an arithmetic number, because the mean of its divisors is an integer number (1494846).

2^2989691 is an apocalyptic number.

2989691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2989691 is an equidigital number, since it uses as much as digits as its factorization.

2989691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 44.

The square root of 2989691 is about 1729.0722946135. The cubic root of 2989691 is about 144.0595657635.

The spelling of 2989691 in words is "two million, nine hundred eighty-nine thousand, six hundred ninety-one".