1688371743 has 4 divisors (see below), whose sum is σ = 2251162328. Its totient is φ = 1125581160.

The previous prime is 1688371739. The next prime is 1688371771. The reversal of 1688371743 is 3471738861.

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

It is not a de Polignac number, because 1688371743 - 2² = 1688371739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1688371692 and 1688371701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688371723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281395288 + ... + 281395293.

It is an arithmetic number, because the mean of its divisors is an integer number (562790582).

Almost surely, 2^1688371743 is an apocalyptic number.

1688371743 is a deficient number, since it is larger than the sum of its proper divisors (562790585).

1688371743 is an equidigital number, since it uses as much as digits as its factorization.

1688371743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562790584.

The product of its digits is 677376, while the sum is 48.

The square root of 1688371743 is about 41089.8009608224. The cubic root of 1688371743 is about 1190.7557619447.

The spelling of 1688371743 in words is "one billion, six hundred eighty-eight million, three hundred seventy-one thousand, seven hundred forty-three".