6520949 has 2 divisors, whose sum is σ = 6520950. Its totient is φ = 6520948.

The previous prime is 6520939. The next prime is 6520951. The reversal of 6520949 is 9490256.

6520949 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6340324 + 180625 = 2518^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 6520949 - 2⁸ = 6520693 is a prime.

Together with 6520951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6520919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260474 + 3260475.

It is an arithmetic number, because the mean of its divisors is an integer number (3260475).

Almost surely, 2^6520949 is an apocalyptic number.

It is an amenable number.

6520949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520949 is an equidigital number, since it uses as much as digits as its factorization.

6520949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 6520949 is about 2553.6148887411. The cubic root of 6520949 is about 186.8258361066.

The spelling of 6520949 in words is "six million, five hundred twenty thousand, nine hundred forty-nine".