686620245 has 8 divisors (see below), whose sum is σ = 1098592416. Its totient is φ = 366197456.

The previous prime is 686620243. The next prime is 686620273. The reversal of 686620245 is 542026686.

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

It is a cyclic number.

It is not a de Polignac number, because 686620245 - 2¹ = 686620243 is a prime.

It is a super-3 number, since 3×686620245³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686620243) 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, 22887327 + ... + 22887356.

It is an arithmetic number, because the mean of its divisors is an integer number (137324052).

Almost surely, 2^686620245 is an apocalyptic number.

It is an amenable number.

686620245 is a deficient number, since it is larger than the sum of its proper divisors (411972171).

686620245 is a wasteful number, since it uses less digits than its factorization.

686620245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45774691.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 686620245 is about 26203.4395643015. The cubic root of 686620245 is about 882.2104574882.

The spelling of 686620245 in words is "six hundred eighty-six million, six hundred twenty thousand, two hundred forty-five".