6649403 has 2 divisors, whose sum is σ = 6649404. Its totient is φ = 6649402.

The previous prime is 6649399. The next prime is 6649417. The reversal of 6649403 is 3049466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6649403 - 2² = 6649399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6649403.

It is not a weakly prime, because it can be changed into another prime (6649453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324701 + 3324702.

It is an arithmetic number, because the mean of its divisors is an integer number (3324702).

Almost surely, 2^6649403 is an apocalyptic number.

6649403 is a deficient number, since it is larger than the sum of its proper divisors (1).

6649403 is an equidigital number, since it uses as much as digits as its factorization.

6649403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 6649403 is about 2578.6436357124. The cubic root of 6649403 is about 188.0446080204.

The spelling of 6649403 in words is "six million, six hundred forty-nine thousand, four hundred three".