685372953 has 16 divisors (see below), whose sum is σ = 927998720. Its totient is φ = 449864064.

The previous prime is 685372951. The next prime is 685372973. The reversal of 685372953 is 359273586.

It is a happy number.

It is not a de Polignac number, because 685372953 - 2¹ = 685372951 is a prime.

It is a super-3 number, since 3×685372953³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685372951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84525 + ... + 92277.

It is an arithmetic number, because the mean of its divisors is an integer number (57999920).

Almost surely, 2^685372953 is an apocalyptic number.

It is an amenable number.

685372953 is a deficient number, since it is larger than the sum of its proper divisors (242625767).

685372953 is a wasteful number, since it uses less digits than its factorization.

685372953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8208.

The product of its digits is 1360800, while the sum is 48.

The square root of 685372953 is about 26179.6285878925. The cubic root of 685372953 is about 881.6759354199.

The spelling of 685372953 in words is "six hundred eighty-five million, three hundred seventy-two thousand, nine hundred fifty-three".