687475319 has 2 divisors, whose sum is σ = 687475320. Its totient is φ = 687475318.

The previous prime is 687475303. The next prime is 687475333. The reversal of 687475319 is 913574786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687475319 - 2⁴ = 687475303 is a prime.

It is a super-2 number, since 2×687475319² = 945244628468303522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687475379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343737659 + 343737660.

It is an arithmetic number, because the mean of its divisors is an integer number (343737660).

Almost surely, 2^687475319 is an apocalyptic number.

687475319 is a deficient number, since it is larger than the sum of its proper divisors (1).

687475319 is an equidigital number, since it uses as much as digits as its factorization.

687475319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 687475319 is about 26219.7505518264. The cubic root of 687475319 is about 882.5765221867.

The spelling of 687475319 in words is "six hundred eighty-seven million, four hundred seventy-five thousand, three hundred nineteen".