686454507 has 10 divisors (see below), whose sum is σ = 1025444508. Its totient is φ = 457636284.

The previous prime is 686454499. The next prime is 686454511. The reversal of 686454507 is 705454686.

It is not a de Polignac number, because 686454507 - 2³ = 686454499 is a prime.

It is a super-2 number, since 2×686454507² = 942439580361226098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686454907) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4237293 + ... + 4237454.

Almost surely, 2^686454507 is an apocalyptic number.

686454507 is a deficient number, since it is larger than the sum of its proper divisors (338990001).

686454507 is an equidigital number, since it uses as much as digits as its factorization.

686454507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8474759 (or 8474750 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 686454507 is about 26200.2768496823. The cubic root of 686454507 is about 882.1394684351.

The spelling of 686454507 in words is "six hundred eighty-six million, four hundred fifty-four thousand, five hundred seven".