688782941 has 12 divisors (see below), whose sum is σ = 865249056. Its totient is φ = 536713320.

The previous prime is 688782917. The next prime is 688782949. The reversal of 688782941 is 149287886.

It is a happy number.

It is not a de Polignac number, because 688782941 - 2¹⁰ = 688781917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688782949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405755 + ... + 407448.

It is an arithmetic number, because the mean of its divisors is an integer number (72104088).

Almost surely, 2^688782941 is an apocalyptic number.

It is an amenable number.

688782941 is a deficient number, since it is larger than the sum of its proper divisors (176466115).

688782941 is a wasteful number, since it uses less digits than its factorization.

688782941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813232 (or 813221 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 53.

The square root of 688782941 is about 26244.6745264635. The cubic root of 688782941 is about 883.1357401001.

The spelling of 688782941 in words is "six hundred eighty-eight million, seven hundred eighty-two thousand, nine hundred forty-one".