685963079 has 4 divisors (see below), whose sum is σ = 686345760. Its totient is φ = 685580400.

The previous prime is 685963049. The next prime is 685963081. The reversal of 685963079 is 970369586.

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-685963079 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 685963079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685963049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188639 + ... + 192240.

It is an arithmetic number, because the mean of its divisors is an integer number (171586440).

Almost surely, 2^685963079 is an apocalyptic number.

685963079 is a deficient number, since it is larger than the sum of its proper divisors (382681).

685963079 is a wasteful number, since it uses less digits than its factorization.

685963079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382680.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 685963079 is about 26190.8968727686. The cubic root of 685963079 is about 881.9289123483.

The spelling of 685963079 in words is "six hundred eighty-five million, nine hundred sixty-three thousand, seventy-nine".