685953017 has 4 divisors (see below), whose sum is σ = 686606736. Its totient is φ = 685299300.

The previous prime is 685953013. The next prime is 685953019. The reversal of 685953017 is 710359586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685953017 - 2² = 685953013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685953011) 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, 325283 + ... + 327384.

It is an arithmetic number, because the mean of its divisors is an integer number (171651684).

Almost surely, 2^685953017 is an apocalyptic number.

It is an amenable number.

685953017 is a deficient number, since it is larger than the sum of its proper divisors (653719).

685953017 is a wasteful number, since it uses less digits than its factorization.

685953017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653718.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 685953017 is about 26190.7047824223. The cubic root of 685953017 is about 881.9246001570.

The spelling of 685953017 in words is "six hundred eighty-five million, nine hundred fifty-three thousand, seventeen".