1687743368 has 8 divisors (see below), whose sum is σ = 3164518830. Its totient is φ = 843871680.

The previous prime is 1687743367. The next prime is 1687743371. The reversal of 1687743368 is 8633477861.

It can be written as a sum of positive squares in only one way, i.e., 1255851844 + 431891524 = 35438^2 + 20782^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1687743367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105483953 + ... + 105483968.

Almost surely, 2^1687743368 is an apocalyptic number.

It is an amenable number.

1687743368 is a deficient number, since it is larger than the sum of its proper divisors (1476775462).

1687743368 is a wasteful number, since it uses less digits than its factorization.

1687743368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210967927 (or 210967923 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 53.

The square root of 1687743368 is about 41082.1538870590. The cubic root of 1687743368 is about 1190.6080192057.

The spelling of 1687743368 in words is "one billion, six hundred eighty-seven million, seven hundred forty-three thousand, three hundred sixty-eight".