711985679 has 4 divisors (see below), whose sum is σ = 712075560. Its totient is φ = 711895800.

The previous prime is 711985643. The next prime is 711985693. The reversal of 711985679 is 976589117.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-711985679 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 711985679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (711985609) 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, 31772 + ... + 49329.

It is an arithmetic number, because the mean of its divisors is an integer number (178018890).

Almost surely, 2^711985679 is an apocalyptic number.

711985679 is a deficient number, since it is larger than the sum of its proper divisors (89881).

711985679 is an equidigital number, since it uses as much as digits as its factorization.

711985679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89880.

The product of its digits is 952560, while the sum is 53.

The square root of 711985679 is about 26683.0597758203. The cubic root of 711985679 is about 892.9430322215.

The spelling of 711985679 in words is "seven hundred eleven million, nine hundred eighty-five thousand, six hundred seventy-nine".