6603997 has 2 divisors, whose sum is σ = 6603998. Its totient is φ = 6603996.

The previous prime is 6603991. The next prime is 6604009. The reversal of 6603997 is 7993066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6180196 + 423801 = 2486^2 + 651^2 .

It is a cyclic number.

It is not a de Polignac number, because 6603997 - 2⁷ = 6603869 is a prime.

It is a super-2 number, since 2×6603997² = 87225552752018, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6603991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3301998 + 3301999.

It is an arithmetic number, because the mean of its divisors is an integer number (3301999).

Almost surely, 2^6603997 is an apocalyptic number.

It is an amenable number.

6603997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6603997 is an equidigital number, since it uses as much as digits as its factorization.

6603997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 6603997 is about 2569.8243130611. The cubic root of 6603997 is about 187.6156039685.

The spelling of 6603997 in words is "six million, six hundred three thousand, nine hundred ninety-seven".