687291314 has 4 divisors (see below), whose sum is σ = 1030936974. Its totient is φ = 343645656.

The previous prime is 687291287. The next prime is 687291349. The reversal of 687291314 is 413192786.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 438693025 + 248598289 = 20945^2 + 15767^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171822827 + ... + 171822830.

Almost surely, 2^687291314 is an apocalyptic number.

687291314 is a deficient number, since it is larger than the sum of its proper divisors (343645660).

687291314 is a wasteful number, since it uses less digits than its factorization.

687291314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343645659.

The product of its digits is 72576, while the sum is 41.

The square root of 687291314 is about 26216.2414163434. The cubic root of 687291314 is about 882.4977736704.

The spelling of 687291314 in words is "six hundred eighty-seven million, two hundred ninety-one thousand, three hundred fourteen".