6520957 has 2 divisors, whose sum is σ = 6520958. Its totient is φ = 6520956.

The previous prime is 6520951. The next prime is 6520963. The reversal of 6520957 is 7590256.

6520957 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (6520951) and next prime (6520963).

It can be written as a sum of positive squares in only one way, i.e., 4968441 + 1552516 = 2229^2 + 1246^2 .

It is a cyclic number.

It is not a de Polignac number, because 6520957 - 2³ = 6520949 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6520951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260478 + 3260479.

It is an arithmetic number, because the mean of its divisors is an integer number (3260479).

Almost surely, 2^6520957 is an apocalyptic number.

It is an amenable number.

6520957 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520957 is an equidigital number, since it uses as much as digits as its factorization.

6520957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 6520957 is about 2553.6164551475. The cubic root of 6520957 is about 186.8259125068.

The spelling of 6520957 in words is "six million, five hundred twenty thousand, nine hundred fifty-seven".