686452069 has 16 divisors (see below), whose sum is σ = 730149120. Its totient is φ = 644353920.

The previous prime is 686452031. The next prime is 686452073. The reversal of 686452069 is 960254686.

It is a cyclic number.

It is not a de Polignac number, because 686452069 - 2²¹ = 684354917 is a prime.

It is a super-2 number, since 2×686452069² = 942432886068761522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686452099) 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, 148024 + ... + 152590.

It is an arithmetic number, because the mean of its divisors is an integer number (45634320).

Almost surely, 2^686452069 is an apocalyptic number.

It is an amenable number.

686452069 is a deficient number, since it is larger than the sum of its proper divisors (43697051).

686452069 is a wasteful number, since it uses less digits than its factorization.

686452069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4740.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 686452069 is about 26200.2303234151. The cubic root of 686452069 is about 882.1384241034.

The spelling of 686452069 in words is "six hundred eighty-six million, four hundred fifty-two thousand, sixty-nine".