705439979 has 4 divisors (see below), whose sum is σ = 712032984. Its totient is φ = 698846976.

The previous prime is 705439963. The next prime is 705439981. The reversal of 705439979 is 979934507.

It is a happy number.

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 705439979 - 2⁴ = 705439963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 705439979.

It is not an unprimeable number, because it can be changed into a prime (705439079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3296342 + ... + 3296555.

It is an arithmetic number, because the mean of its divisors is an integer number (178008246).

Almost surely, 2^705439979 is an apocalyptic number.

705439979 is a deficient number, since it is larger than the sum of its proper divisors (6593005).

705439979 is a wasteful number, since it uses less digits than its factorization.

705439979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6593004.

The product of its (nonzero) digits is 2143260, while the sum is 53.

The square root of 705439979 is about 26560.1200863249. The cubic root of 705439979 is about 890.1981543384.

The spelling of 705439979 in words is "seven hundred five million, four hundred thirty-nine thousand, nine hundred seventy-nine".