6620953 has 2 divisors, whose sum is σ = 6620954. Its totient is φ = 6620952.

The previous prime is 6620951. The next prime is 6620981. The reversal of 6620953 is 3590266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6568969 + 51984 = 2563^2 + 228^2 .

It is a cyclic number.

It is not a de Polignac number, because 6620953 - 2¹ = 6620951 is a prime.

Together with 6620951, it forms a pair of twin primes.

6620953 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6620951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310476 + 3310477.

It is an arithmetic number, because the mean of its divisors is an integer number (3310477).

Almost surely, 2^6620953 is an apocalyptic number.

It is an amenable number.

6620953 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620953 is an equidigital number, since it uses as much as digits as its factorization.

6620953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 6620953 is about 2573.1212563733. The cubic root of 6620953 is about 187.7760366798.

The spelling of 6620953 in words is "six million, six hundred twenty thousand, nine hundred fifty-three".