3101491 has 2 divisors, whose sum is σ = 3101492. Its totient is φ = 3101490.

The previous prime is 3101479. The next prime is 3101509. The reversal of 3101491 is 1941013.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1941013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3101491 - 2⁵ = 3101459 is a prime.

It is not a weakly prime, because it can be changed into another prime (3101471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1550745 + 1550746.

It is an arithmetic number, because the mean of its divisors is an integer number (1550746).

Almost surely, 2^3101491 is an apocalyptic number.

3101491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3101491 is an equidigital number, since it uses as much as digits as its factorization.

3101491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 3101491 is about 1761.1050508133. The cubic root of 3101491 is about 145.8333464671.

The spelling of 3101491 in words is "three million, one hundred one thousand, four hundred ninety-one".