1683138353 has 4 divisors (see below), whose sum is σ = 1812610548. Its totient is φ = 1553666160.

The previous prime is 1683138343. The next prime is 1683138361. The reversal of 1683138353 is 3538313861.

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 1090848784 + 592289569 = 33028^2 + 24337^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683138353 - 2²⁶ = 1616029489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1683138353.

It is not an unprimeable number, because it can be changed into a prime (1683138343) 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, 64736078 + ... + 64736103.

It is an arithmetic number, because the mean of its divisors is an integer number (453152637).

Almost surely, 2^1683138353 is an apocalyptic number.

1683138353 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1683138353 is a deficient number, since it is larger than the sum of its proper divisors (129472195).

1683138353 is a wasteful number, since it uses less digits than its factorization.

1683138353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129472194.

The product of its digits is 155520, while the sum is 41.

The square root of 1683138353 is about 41026.0691877738. The cubic root of 1683138353 is about 1189.5241731563.

The spelling of 1683138353 in words is "one billion, six hundred eighty-three million, one hundred thirty-eight thousand, three hundred fifty-three".