2604997 has 2 divisors, whose sum is σ = 2604998. Its totient is φ = 2604996.

The previous prime is 2604977. The next prime is 2605007. The reversal of 2604997 is 7994062.

It is a Cunningham number, because it is equal to 1614²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2604996 + 1 = 1614^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 2604997 - 2⁷ = 2604869 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2604907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302498 + 1302499.

It is an arithmetic number, because the mean of its divisors is an integer number (1302499).

2^2604997 is an apocalyptic number.

It is an amenable number.

2604997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2604997 is an equidigital number, since it uses as much as digits as its factorization.

2604997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 2604997 is about 1614.0003097893. Note that the first 3 decimals coincide. The cubic root of 2604997 is about 137.5949228848.

The spelling of 2604997 in words is "two million, six hundred four thousand, nine hundred ninety-seven".