6505979 has 4 divisors (see below), whose sum is σ = 6595176. Its totient is φ = 6416784.

The previous prime is 6505973. The next prime is 6505991. The reversal of 6505979 is 9795056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6505979 - 2¹⁶ = 6440443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6505973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44489 + ... + 44634.

It is an arithmetic number, because the mean of its divisors is an integer number (1648794).

Almost surely, 2^6505979 is an apocalyptic number.

6505979 is a deficient number, since it is larger than the sum of its proper divisors (89197).

6505979 is an equidigital number, since it uses as much as digits as its factorization.

6505979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89196.

The product of its (nonzero) digits is 85050, while the sum is 41.

The square root of 6505979 is about 2550.6820656444. The cubic root of 6505979 is about 186.6827625718.

The spelling of 6505979 in words is "six million, five hundred five thousand, nine hundred seventy-nine".