688878467 has 2 divisors, whose sum is σ = 688878468. Its totient is φ = 688878466.

The previous prime is 688878431. The next prime is 688878493. The reversal of 688878467 is 764878886.

688878467 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 688878467 - 2¹² = 688874371 is a prime.

It is not a weakly prime, because it can be changed into another prime (688878167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344439233 + 344439234.

It is an arithmetic number, because the mean of its divisors is an integer number (344439234).

Almost surely, 2^688878467 is an apocalyptic number.

688878467 is a deficient number, since it is larger than the sum of its proper divisors (1).

688878467 is an equidigital number, since it uses as much as digits as its factorization.

688878467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28901376, while the sum is 62.

The square root of 688878467 is about 26246.4943754399. The cubic root of 688878467 is about 883.1765650199.

The spelling of 688878467 in words is "six hundred eighty-eight million, eight hundred seventy-eight thousand, four hundred sixty-seven".