688506954 has 16 divisors (see below), whose sum is σ = 1378339200. Its totient is φ = 229281440.

The previous prime is 688506913. The next prime is 688506961. The reversal of 688506954 is 459605886.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 688506897 and 688506906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48402 + ... + 60989.

It is an arithmetic number, because the mean of its divisors is an integer number (86146200).

Almost surely, 2^688506954 is an apocalyptic number.

688506954 is an abundant number, since it is smaller than the sum of its proper divisors (689832246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

688506954 is a wasteful number, since it uses less digits than its factorization.

688506954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110445.

The product of its (nonzero) digits is 2073600, while the sum is 51.

The square root of 688506954 is about 26239.4160377094. The cubic root of 688506954 is about 883.0177704031.

The spelling of 688506954 in words is "six hundred eighty-eight million, five hundred six thousand, nine hundred fifty-four".