687274163 has 2 divisors, whose sum is σ = 687274164. Its totient is φ = 687274162.

The previous prime is 687274153. The next prime is 687274199. The reversal of 687274163 is 361472786.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687274163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (687274153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343637081 + 343637082.

It is an arithmetic number, because the mean of its divisors is an integer number (343637082).

Almost surely, 2^687274163 is an apocalyptic number.

687274163 is a deficient number, since it is larger than the sum of its proper divisors (1).

687274163 is an equidigital number, since it uses as much as digits as its factorization.

687274163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 44.

The square root of 687274163 is about 26215.9143079161. The cubic root of 687274163 is about 882.4904328506.

The spelling of 687274163 in words is "six hundred eighty-seven million, two hundred seventy-four thousand, one hundred sixty-three".