1688419753 has 4 divisors (see below), whose sum is σ = 1787738580. Its totient is φ = 1589100928.

The previous prime is 1688419739. The next prime is 1688419757. The reversal of 1688419753 is 3579148861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3579148861 = 37 ⋅96733753.

It can be written as a sum of positive squares in 2 ways, for example, as 530242729 + 1158177024 = 23027^2 + 34032^2 .

It is a cyclic number.

It is not a de Polignac number, because 1688419753 - 2⁹ = 1688419241 is a prime.

It is a super-2 number, since 2×1688419753² = 5701522524641162018, which contains 22 as substring.

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 1688419753.

It is not an unprimeable number, because it can be changed into a prime (1688419757) 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, 49659388 + ... + 49659421.

It is an arithmetic number, because the mean of its divisors is an integer number (446934645).

Almost surely, 2^1688419753 is an apocalyptic number.

It is an amenable number.

1688419753 is a deficient number, since it is larger than the sum of its proper divisors (99318827).

1688419753 is an equidigital number, since it uses as much as digits as its factorization.

1688419753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99318826.

The product of its digits is 1451520, while the sum is 52.

The square root of 1688419753 is about 41090.3851649020. The cubic root of 1688419753 is about 1190.7670484880.

The spelling of 1688419753 in words is "one billion, six hundred eighty-eight million, four hundred nineteen thousand, seven hundred fifty-three".