6540719 has 2 divisors, whose sum is σ = 6540720. Its totient is φ = 6540718.

The previous prime is 6540691. The next prime is 6540739. The reversal of 6540719 is 9170456.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6540719 - 2²⁰ = 5492143 is a prime.

It is a super-2 number, since 2×6540719² = 85562010073922, which contains 22 as substring.

It is an Ulam number.

It is equal to p₄₄₇₃₅₉ and since 6540719 and 447359 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6540739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270359 + 3270360.

It is an arithmetic number, because the mean of its divisors is an integer number (3270360).

Almost surely, 2^6540719 is an apocalyptic number.

6540719 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540719 is an equidigital number, since it uses as much as digits as its factorization.

6540719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 6540719 is about 2557.4829422696. The cubic root of 6540719 is about 187.0144497780.

The spelling of 6540719 in words is "six million, five hundred forty thousand, seven hundred nineteen".