6620903 has 4 divisors (see below), whose sum is σ = 6849240. Its totient is φ = 6392568.

The previous prime is 6620899. The next prime is 6620927. The reversal of 6620903 is 3090266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6620903 - 2² = 6620899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114125 + ... + 114182.

It is an arithmetic number, because the mean of its divisors is an integer number (1712310).

Almost surely, 2^6620903 is an apocalyptic number.

6620903 is a deficient number, since it is larger than the sum of its proper divisors (228337).

6620903 is a wasteful number, since it uses less digits than its factorization.

6620903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228336.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 6620903 is about 2573.1115405283. Note that the first 3 decimals coincide. The cubic root of 6620903 is about 187.7755639974.

The spelling of 6620903 in words is "six million, six hundred twenty thousand, nine hundred three".