687348379 has 2 divisors, whose sum is σ = 687348380. Its totient is φ = 687348378.

The previous prime is 687348359. The next prime is 687348383. The reversal of 687348379 is 973843786.

687348379 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 687348379 - 2⁷ = 687348251 is a prime.

It is a super-2 number, since 2×687348379² = 944895588227855282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (687348359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343674189 + 343674190.

It is an arithmetic number, because the mean of its divisors is an integer number (343674190).

Almost surely, 2^687348379 is an apocalyptic number.

687348379 is a deficient number, since it is larger than the sum of its proper divisors (1).

687348379 is an equidigital number, since it uses as much as digits as its factorization.

687348379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 55.

The square root of 687348379 is about 26217.3297457998. The cubic root of 687348379 is about 882.5221972498.

The spelling of 687348379 in words is "six hundred eighty-seven million, three hundred forty-eight thousand, three hundred seventy-nine".