687133619 has 2 divisors, whose sum is σ = 687133620. Its totient is φ = 687133618.

The previous prime is 687133609. The next prime is 687133621. The reversal of 687133619 is 916331786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687133619 - 2²⁴ = 670356403 is a prime.

It is a super-2 number, since 2×687133619² = 944305220720074322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 687133621, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 687133619.

It is not a weakly prime, because it can be changed into another prime (687133609) 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, 343566809 + 343566810.

It is an arithmetic number, because the mean of its divisors is an integer number (343566810).

Almost surely, 2^687133619 is an apocalyptic number.

687133619 is a deficient number, since it is larger than the sum of its proper divisors (1).

687133619 is an equidigital number, since it uses as much as digits as its factorization.

687133619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 687133619 is about 26213.2336616450. The cubic root of 687133619 is about 882.4302738449.

The spelling of 687133619 in words is "six hundred eighty-seven million, one hundred thirty-three thousand, six hundred nineteen".