1688030497 has 4 divisors (see below), whose sum is σ = 1691724676. Its totient is φ = 1684336320.

The previous prime is 1688030483. The next prime is 1688030527. The reversal of 1688030497 is 7940308861.

It is a happy number.

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 1380939921 + 307090576 = 37161^2 + 17524^2 .

It is a cyclic number.

It is not a de Polignac number, because 1688030497 - 2¹¹ = 1688028449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688030417) 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, 1846404 + ... + 1847317.

It is an arithmetic number, because the mean of its divisors is an integer number (422931169).

Almost surely, 2^1688030497 is an apocalyptic number.

It is an amenable number.

1688030497 is a deficient number, since it is larger than the sum of its proper divisors (3694179).

1688030497 is an equidigital number, since it uses as much as digits as its factorization.

1688030497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694178.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 1688030497 is about 41085.6483093549. The cubic root of 1688030497 is about 1190.6755331638.

The spelling of 1688030497 in words is "one billion, six hundred eighty-eight million, thirty thousand, four hundred ninety-seven".