2961691 has 2 divisors, whose sum is σ = 2961692. Its totient is φ = 2961690.

The previous prime is 2961677. The next prime is 2961713. The reversal of 2961691 is 1961692.

2961691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2961691 - 2⁵ = 2961659 is a prime.

It is a super-2 number, since 2×2961691² = 17543227158962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2961671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1480845 + 1480846.

It is an arithmetic number, because the mean of its divisors is an integer number (1480846).

2^2961691 is an apocalyptic number.

2961691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2961691 is an equidigital number, since it uses as much as digits as its factorization.

2961691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 34.

The square root of 2961691 is about 1720.9564201339. The cubic root of 2961691 is about 143.6084236853.

Subtracting from 2961691 its reverse (1961692), we obtain a palindrome (999999).

The spelling of 2961691 in words is "two million, nine hundred sixty-one thousand, six hundred ninety-one".