687228319 has 2 divisors, whose sum is σ = 687228320. Its totient is φ = 687228318.

The previous prime is 687228299. The next prime is 687228329. The reversal of 687228319 is 913822786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687228319 - 2⁵ = 687228287 is a prime.

It is a super-2 number, since 2×687228319² = 944565524871131522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687228329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343614159 + 343614160.

It is an arithmetic number, because the mean of its divisors is an integer number (343614160).

Almost surely, 2^687228319 is an apocalyptic number.

687228319 is a deficient number, since it is larger than the sum of its proper divisors (1).

687228319 is an equidigital number, since it uses as much as digits as its factorization.

687228319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 687228319 is about 26215.0399389358. The cubic root of 687228319 is about 882.4708105062.

The spelling of 687228319 in words is "six hundred eighty-seven million, two hundred twenty-eight thousand, three hundred nineteen".