6539497 has 2 divisors, whose sum is σ = 6539498. Its totient is φ = 6539496.

The previous prime is 6539473. The next prime is 6539513. The reversal of 6539497 is 7949356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6370576 + 168921 = 2524^2 + 411^2 .

It is a cyclic number.

It is not a de Polignac number, because 6539497 - 2⁷ = 6539369 is a prime.

It is a d-powerful number, because it can be written as 6⁸ + 5 + 3³ + 9⁵ + 4⁵ + 9⁷ + 7⁵ .

6539497 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6539437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3269748 + 3269749.

It is an arithmetic number, because the mean of its divisors is an integer number (3269749).

Almost surely, 2^6539497 is an apocalyptic number.

It is an amenable number.

6539497 is a deficient number, since it is larger than the sum of its proper divisors (1).

6539497 is an equidigital number, since it uses as much as digits as its factorization.

6539497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 6539497 is about 2557.2440243356. The cubic root of 6539497 is about 187.0028024402.

The spelling of 6539497 in words is "six million, five hundred thirty-nine thousand, four hundred ninety-seven".