1688000353 has 4 divisors (see below), whose sum is σ = 1817846548. Its totient is φ = 1558154160.

The previous prime is 1688000341. The next prime is 1688000387. The reversal of 1688000353 is 3530008861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 174556944 + 1513443409 = 13212^2 + 38903^2 .

It is a cyclic number.

It is not a de Polignac number, because 1688000353 - 2²¹ = 1685903201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688000393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64923078 + ... + 64923103.

It is an arithmetic number, because the mean of its divisors is an integer number (454461637).

Almost surely, 2^1688000353 is an apocalyptic number.

1688000353 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1688000353 is a deficient number, since it is larger than the sum of its proper divisors (129846195).

1688000353 is a wasteful number, since it uses less digits than its factorization.

1688000353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129846194.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1688000353 is about 41085.2814642908. The cubic root of 1688000353 is about 1190.6684456266.

The spelling of 1688000353 in words is "one billion, six hundred eighty-eight million, three hundred fifty-three", and thus it is an aban number.