2991497 has 2 divisors, whose sum is σ = 2991498. Its totient is φ = 2991496.

The previous prime is 2991481. The next prime is 2991511. The reversal of 2991497 is 7941992.

It is a happy number.

2991497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2972176 + 19321 = 1724^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 2991497 - 2⁴ = 2991481 is a prime.

It is not a weakly prime, because it can be changed into another prime (2991397) 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, 1495748 + 1495749.

It is an arithmetic number, because the mean of its divisors is an integer number (1495749).

2^2991497 is an apocalyptic number.

It is an amenable number.

2991497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2991497 is an equidigital number, since it uses as much as digits as its factorization.

2991497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 2991497 is about 1729.5944611382. The cubic root of 2991497 is about 144.0885675573.

The spelling of 2991497 in words is "two million, nine hundred ninety-one thousand, four hundred ninety-seven".