686721452 has 6 divisors (see below), whose sum is σ = 1201762548. Its totient is φ = 343360724.

The previous prime is 686721403. The next prime is 686721457. The reversal of 686721452 is 254127686.

686721452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (686721457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85840178 + ... + 85840185.

It is an arithmetic number, because the mean of its divisors is an integer number (200293758).

Almost surely, 2^686721452 is an apocalyptic number.

It is an amenable number.

686721452 is a deficient number, since it is larger than the sum of its proper divisors (515041096).

686721452 is a wasteful number, since it uses less digits than its factorization.

686721452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171680367 (or 171680365 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 686721452 is about 26205.3706709140. The cubic root of 686721452 is about 882.2538009462.

The spelling of 686721452 in words is "six hundred eighty-six million, seven hundred twenty-one thousand, four hundred fifty-two".