685673963 has 8 divisors (see below), whose sum is σ = 738641568. Its totient is φ = 632738304.

The previous prime is 685673939. The next prime is 685673993. The reversal of 685673963 is 369376586.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685673963 is a prime.

It is a super-2 number, since 2×685673963² = 940297567072250738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685673993) 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, 55106 + ... + 66392.

It is an arithmetic number, because the mean of its divisors is an integer number (92330196).

Almost surely, 2^685673963 is an apocalyptic number.

685673963 is a deficient number, since it is larger than the sum of its proper divisors (52967605).

685673963 is a wasteful number, since it uses less digits than its factorization.

685673963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15973.

The product of its digits is 4898880, while the sum is 53.

The square root of 685673963 is about 26185.3768924566. The cubic root of 685673963 is about 881.8049913978.

The spelling of 685673963 in words is "six hundred eighty-five million, six hundred seventy-three thousand, nine hundred sixty-three".