2605021973 has 2 divisors, whose sum is σ = 2605021974. Its totient is φ = 2605021972.

The previous prime is 2605021957. The next prime is 2605022033. The reversal of 2605021973 is 3791205062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2394829969 + 210192004 = 48937^2 + 14498^2 .

It is a cyclic number.

It is not a de Polignac number, because 2605021973 - 2⁴ = 2605021957 is a prime.

It is a super-2 number, since 2×2605021973² = 13572278959625625458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2605021933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302510986 + 1302510987.

It is an arithmetic number, because the mean of its divisors is an integer number (1302510987).

Almost surely, 2^2605021973 is an apocalyptic number.

It is an amenable number.

2605021973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605021973 is an equidigital number, since it uses as much as digits as its factorization.

2605021973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 2605021973 is about 51039.4158763597. The cubic root of 2605021973 is about 1375.9536257145.

The spelling of 2605021973 in words is "two billion, six hundred five million, twenty-one thousand, nine hundred seventy-three".