1368404687 has 4 divisors (see below), whose sum is σ = 1473666600. Its totient is φ = 1263142776.

The previous prime is 1368404683. The next prime is 1368404689. The reversal of 1368404687 is 7864048631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7864048631 = 1789 ⋅4395779.

It is a cyclic number.

It is not a de Polignac number, because 1368404687 - 2² = 1368404683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368404683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52630937 + ... + 52630962.

It is an arithmetic number, because the mean of its divisors is an integer number (368416650).

Almost surely, 2^1368404687 is an apocalyptic number.

1368404687 is a deficient number, since it is larger than the sum of its proper divisors (105261913).

1368404687 is a wasteful number, since it uses less digits than its factorization.

1368404687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105261912.

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 1368404687 is about 36991.9543549675. The cubic root of 1368404687 is about 1110.2092744504.

The spelling of 1368404687 in words is "one billion, three hundred sixty-eight million, four hundred four thousand, six hundred eighty-seven".