2690491 has 2 divisors, whose sum is σ = 2690492. Its totient is φ = 2690490.

The previous prime is 2690473. The next prime is 2690497. The reversal of 2690491 is 1940962.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2690491 - 2⁹ = 2689979 is a prime.

2690491 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2690497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345245 + 1345246.

It is an arithmetic number, because the mean of its divisors is an integer number (1345246).

2^2690491 is an apocalyptic number.

2690491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2690491 is an equidigital number, since it uses as much as digits as its factorization.

2690491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2690491 is about 1640.2716238477. The cubic root of 2690491 is about 139.0840028442.

The spelling of 2690491 in words is "two million, six hundred ninety thousand, four hundred ninety-one".