685176961 has 8 divisors (see below), whose sum is σ = 790378560. Its totient is φ = 581805168.

The previous prime is 685176941. The next prime is 685176977. The reversal of 685176961 is 169671586.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 685176961 - 2¹¹ = 685174913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685176941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456646 + ... + 458143.

It is an arithmetic number, because the mean of its divisors is an integer number (98797320).

Almost surely, 2^685176961 is an apocalyptic number.

It is an amenable number.

685176961 is a deficient number, since it is larger than the sum of its proper divisors (105201599).

685176961 is a wasteful number, since it uses less digits than its factorization.

685176961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914903.

The product of its digits is 544320, while the sum is 49.

The square root of 685176961 is about 26175.8851044239. The cubic root of 685176961 is about 881.5918848781.

The spelling of 685176961 in words is "six hundred eighty-five million, one hundred seventy-six thousand, nine hundred sixty-one".