688442955 has 8 divisors (see below), whose sum is σ = 1101508752. Its totient is φ = 367169568.

The previous prime is 688442939. The next prime is 688442983. The reversal of 688442955 is 559244886.

It is a happy number.

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

It is not a de Polignac number, because 688442955 - 2⁴ = 688442939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 688442898 and 688442907.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22948084 + ... + 22948113.

It is an arithmetic number, because the mean of its divisors is an integer number (137688594).

Almost surely, 2^688442955 is an apocalyptic number.

688442955 is a deficient number, since it is larger than the sum of its proper divisors (413065797).

688442955 is a wasteful number, since it uses less digits than its factorization.

688442955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45896205.

The product of its digits is 2764800, while the sum is 51.

The square root of 688442955 is about 26238.1964890882. The cubic root of 688442955 is about 882.9904097473.

The spelling of 688442955 in words is "six hundred eighty-eight million, four hundred forty-two thousand, nine hundred fifty-five".