1386404687 has 4 divisors (see below), whose sum is σ = 1412563320. Its totient is φ = 1360246056.

The previous prime is 1386404659. The next prime is 1386404713. The reversal of 1386404687 is 7864046831.

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: 7864046831 = 11617 ⋅676943.

It is a cyclic number.

It is not a de Polignac number, because 1386404687 - 2⁶ = 1386404623 is a prime.

It is a super-2 number, since 2×1386404687² = 3844235912271135938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386404647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13079237 + ... + 13079342.

It is an arithmetic number, because the mean of its divisors is an integer number (353140830).

Almost surely, 2^1386404687 is an apocalyptic number.

1386404687 is a deficient number, since it is larger than the sum of its proper divisors (26158633).

1386404687 is an equidigital number, since it uses as much as digits as its factorization.

1386404687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26158632.

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

The square root of 1386404687 is about 37234.4556425900. The cubic root of 1386404687 is about 1115.0559838367.

The spelling of 1386404687 in words is "one billion, three hundred eighty-six million, four hundred four thousand, six hundred eighty-seven".