688361494 has 8 divisors (see below), whose sum is σ = 1035842040. Its totient is φ = 343080816.

The previous prime is 688361489. The next prime is 688361519. The reversal of 688361494 is 494163886.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549184 + ... + 550435.

It is an arithmetic number, because the mean of its divisors is an integer number (129480255).

Almost surely, 2^688361494 is an apocalyptic number.

688361494 is a deficient number, since it is larger than the sum of its proper divisors (347480546).

688361494 is a wasteful number, since it uses less digits than its factorization.

688361494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099934.

The product of its digits is 995328, while the sum is 49.

The square root of 688361494 is about 26236.6441070500. The cubic root of 688361494 is about 882.9555813380.

The spelling of 688361494 in words is "six hundred eighty-eight million, three hundred sixty-one thousand, four hundred ninety-four".