688472211 has 16 divisors (see below), whose sum is σ = 1082943488. Its totient is φ = 380721600.

The previous prime is 688472189. The next prime is 688472219. The reversal of 688472211 is 112274886.

It is a happy number.

It is not a de Polignac number, because 688472211 - 2¹¹ = 688470163 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 688472211.

It is not an unprimeable number, because it can be changed into a prime (688472219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528130 + ... + 529431.

It is an arithmetic number, because the mean of its divisors is an integer number (67683968).

Almost surely, 2^688472211 is an apocalyptic number.

688472211 is a deficient number, since it is larger than the sum of its proper divisors (394471277).

688472211 is a wasteful number, since it uses less digits than its factorization.

688472211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057602.

The product of its digits is 43008, while the sum is 39.

The square root of 688472211 is about 26238.7539909958. The cubic root of 688472211 is about 883.0029173929.

The spelling of 688472211 in words is "six hundred eighty-eight million, four hundred seventy-two thousand, two hundred eleven".