697878887 has 2 divisors, whose sum is σ = 697878888. Its totient is φ = 697878886.

The previous prime is 697878877. The next prime is 697878919. The reversal of 697878887 is 788878796.

697878887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 697878887 - 2¹² = 697874791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697878817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348939443 + 348939444.

It is an arithmetic number, because the mean of its divisors is an integer number (348939444).

Almost surely, 2^697878887 is an apocalyptic number.

697878887 is a deficient number, since it is larger than the sum of its proper divisors (1).

697878887 is an equidigital number, since it uses as much as digits as its factorization.

697878887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75866112, while the sum is 68.

The square root of 697878887 is about 26417.3974304813. The cubic root of 697878887 is about 887.0062635478.

Subtracting 697878887 from its reverse (788878796), we obtain a palindrome (90999909).

The spelling of 697878887 in words is "six hundred ninety-seven million, eight hundred seventy-eight thousand, eight hundred eighty-seven".