1688048197 has 4 divisors (see below), whose sum is σ = 1841507136. Its totient is φ = 1534589260.

The previous prime is 1688048189. The next prime is 1688048203. The reversal of 1688048197 is 7918408861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1688048197 - 2³ = 1688048189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688045197) 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, 76729453 + ... + 76729474.

It is an arithmetic number, because the mean of its divisors is an integer number (460376784).

Almost surely, 2^1688048197 is an apocalyptic number.

It is an amenable number.

1688048197 is a deficient number, since it is larger than the sum of its proper divisors (153458939).

1688048197 is a wasteful number, since it uses less digits than its factorization.

1688048197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153458938.

The product of its (nonzero) digits is 774144, while the sum is 52.

The square root of 1688048197 is about 41085.8637124741. The cubic root of 1688048197 is about 1190.6796947954.

The spelling of 1688048197 in words is "one billion, six hundred eighty-eight million, forty-eight thousand, one hundred ninety-seven".