1683957353 has 4 divisors (see below), whose sum is σ = 1813492548. Its totient is φ = 1554422160.

The previous prime is 1683957347. The next prime is 1683957377. The reversal of 1683957353 is 3537593861.

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 206554384 + 1477402969 = 14372^2 + 38437^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683957353 - 2⁴ = 1683957337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1683957383) 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, 64767578 + ... + 64767603.

It is an arithmetic number, because the mean of its divisors is an integer number (453373137).

Almost surely, 2^1683957353 is an apocalyptic number.

1683957353 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1683957353 is a deficient number, since it is larger than the sum of its proper divisors (129535195).

1683957353 is a wasteful number, since it uses less digits than its factorization.

1683957353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129535194.

The product of its digits is 2041200, while the sum is 50.

The square root of 1683957353 is about 41036.0494321761. The cubic root of 1683957353 is about 1189.7170791292.

The spelling of 1683957353 in words is "one billion, six hundred eighty-three million, nine hundred fifty-seven thousand, three hundred fifty-three".