688728151 has 2 divisors, whose sum is σ = 688728152. Its totient is φ = 688728150.

The previous prime is 688728067. The next prime is 688728179. The reversal of 688728151 is 151827886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 688728151 - 2¹⁵ = 688695383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688723151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344364075 + 344364076.

It is an arithmetic number, because the mean of its divisors is an integer number (344364076).

Almost surely, 2^688728151 is an apocalyptic number.

688728151 is a deficient number, since it is larger than the sum of its proper divisors (1).

688728151 is an equidigital number, since it uses as much as digits as its factorization.

688728151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 46.

The square root of 688728151 is about 26243.6306748895. The cubic root of 688728151 is about 883.1123228098.

The spelling of 688728151 in words is "six hundred eighty-eight million, seven hundred twenty-eight thousand, one hundred fifty-one".