688457134 has 8 divisors (see below), whose sum is σ = 1087037640. Its totient is φ = 326111256.

The previous prime is 688457111. The next prime is 688457149. The reversal of 688457134 is 431754886.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9058609 + ... + 9058684.

It is an arithmetic number, because the mean of its divisors is an integer number (135879705).

Almost surely, 2^688457134 is an apocalyptic number.

688457134 is a deficient number, since it is larger than the sum of its proper divisors (398580506).

688457134 is a wasteful number, since it uses less digits than its factorization.

688457134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18117314.

The product of its digits is 645120, while the sum is 46.

The square root of 688457134 is about 26238.4666853839. The cubic root of 688457134 is about 882.9964716560.

The spelling of 688457134 in words is "six hundred eighty-eight million, four hundred fifty-seven thousand, one hundred thirty-four".