1688363243 has 8 divisors (see below), whose sum is σ = 1981708512. Its totient is φ = 1408055616.

The previous prime is 1688363227. The next prime is 1688363249. The reversal of 1688363243 is 3423638861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1688363243 - 2⁴ = 1688363227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1688363194 and 1688363203.

It is not an unprimeable number, because it can be changed into a prime (1688363249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3259130 + ... + 3259647.

It is an arithmetic number, because the mean of its divisors is an integer number (247713564).

Almost surely, 2^1688363243 is an apocalyptic number.

1688363243 is a deficient number, since it is larger than the sum of its proper divisors (293345269).

1688363243 is an equidigital number, since it uses as much as digits as its factorization.

1688363243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6518821.

The product of its digits is 497664, while the sum is 44.

The square root of 1688363243 is about 41089.6975286993. The cubic root of 1688363243 is about 1190.7537636800.

The spelling of 1688363243 in words is "one billion, six hundred eighty-eight million, three hundred sixty-three thousand, two hundred forty-three".