1688888867 has 2 divisors, whose sum is σ = 1688888868. Its totient is φ = 1688888866.

The previous prime is 1688888849. The next prime is 1688888879. The reversal of 1688888867 is 7688888861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1688888867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1688888797 and 1688888806.

It is not a weakly prime, because it can be changed into another prime (1688888567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844444433 + 844444434.

It is an arithmetic number, because the mean of its divisors is an integer number (844444434).

Almost surely, 2^1688888867 is an apocalyptic number.

1688888867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688888867 is an equidigital number, since it uses as much as digits as its factorization.

1688888867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66060288, while the sum is 68.

The square root of 1688888867 is about 41096.0930868130. The cubic root of 1688888867 is about 1190.8773199939.

The spelling of 1688888867 in words is "one billion, six hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-seven".