6435979 has 16 divisors (see below), whose sum is σ = 7520256. Its totient is φ = 5443200.

The previous prime is 6435973. The next prime is 6435983. The reversal of 6435979 is 9795346.

It is a cyclic number.

It is not a de Polignac number, because 6435979 - 2⁹ = 6435467 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6⁴ + 4⁵ + 3⁵ + 5⁷ + 9⁵ + 7⁸ + 9⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6435973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23614 + ... + 23884.

It is an arithmetic number, because the mean of its divisors is an integer number (470016).

Almost surely, 2^6435979 is an apocalyptic number.

6435979 is a deficient number, since it is larger than the sum of its proper divisors (1084277).

6435979 is a wasteful number, since it uses less digits than its factorization.

6435979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

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

The square root of 6435979 is about 2536.9231363997. The cubic root of 6435979 is about 186.0108195040.

The spelling of 6435979 in words is "six million, four hundred thirty-five thousand, nine hundred seventy-nine".