1688830047 has 16 divisors (see below), whose sum is σ = 2503591680. Its totient is φ = 1125157176.

The previous prime is 1688830021. The next prime is 1688830061. The reversal of 1688830047 is 7400388861.

It is a de Polignac number, because none of the positive numbers 2^k-1688830047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1688829984 and 1688830011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688831047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23928 + ... + 62850.

It is an arithmetic number, because the mean of its divisors is an integer number (156474480).

Almost surely, 2^1688830047 is an apocalyptic number.

1688830047 is a deficient number, since it is larger than the sum of its proper divisors (814761633).

1688830047 is a wasteful number, since it uses less digits than its factorization.

1688830047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40539 (or 40533 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1688830047 is about 41095.3774407779. The cubic root of 1688830047 is about 1190.8634946877.

The spelling of 1688830047 in words is "one billion, six hundred eighty-eight million, eight hundred thirty thousand, forty-seven".