688352290291 has 4 divisors (see below), whose sum is σ = 705141370584. Its totient is φ = 671563210000.

The previous prime is 688352290277. The next prime is 688352290303. The reversal of 688352290291 is 192092253886.

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

It is a cyclic number.

It is not a de Polignac number, because 688352290291 - 2¹¹ = 688352288243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688352290231) 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, 8394540085 + ... + 8394540166.

It is an arithmetic number, because the mean of its divisors is an integer number (176285342646).

Almost surely, 2^688352290291 is an apocalyptic number.

688352290291 is a deficient number, since it is larger than the sum of its proper divisors (16789080293).

688352290291 is a wasteful number, since it uses less digits than its factorization.

688352290291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16789080292.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 688352290291 in words is "six hundred eighty-eight billion, three hundred fifty-two million, two hundred ninety thousand, two hundred ninety-one".