688884793 has 2 divisors, whose sum is σ = 688884794. Its totient is φ = 688884792.

The previous prime is 688884751. The next prime is 688884797. The reversal of 688884793 is 397488886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 685758969 + 3125824 = 26187^2 + 1768^2 .

It is a cyclic number.

It is not a de Polignac number, because 688884793 - 2¹⁷ = 688753721 is a prime.

It is not a weakly prime, because it can be changed into another prime (688884797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344442396 + 344442397.

It is an arithmetic number, because the mean of its divisors is an integer number (344442397).

Almost surely, 2^688884793 is an apocalyptic number.

It is an amenable number.

688884793 is a deficient number, since it is larger than the sum of its proper divisors (1).

688884793 is an equidigital number, since it uses as much as digits as its factorization.

688884793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18579456, while the sum is 61.

The square root of 688884793 is about 26246.6148864954. The cubic root of 688884793 is about 883.1792684275.

It can be divided in two parts, 688 and 884793, that added together give a square (885481 = 941²).

The spelling of 688884793 in words is "six hundred eighty-eight million, eight hundred eighty-four thousand, seven hundred ninety-three".