1688698342 has 16 divisors (see below), whose sum is σ = 2569555872. Its totient is φ = 832196160.

The previous prime is 1688698331. The next prime is 1688698357. The reversal of 1688698342 is 2438968861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264168 + ... + 270484.

It is an arithmetic number, because the mean of its divisors is an integer number (160597242).

Almost surely, 2^1688698342 is an apocalyptic number.

1688698342 is a deficient number, since it is larger than the sum of its proper divisors (880857530).

1688698342 is a wasteful number, since it uses less digits than its factorization.

1688698342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8223.

The product of its digits is 3981312, while the sum is 55.

The square root of 1688698342 is about 41093.7749786996. The cubic root of 1688698342 is about 1190.8325370130.

The spelling of 1688698342 in words is "one billion, six hundred eighty-eight million, six hundred ninety-eight thousand, three hundred forty-two".