1386716493 has 4 divisors (see below), whose sum is σ = 1848955328. Its totient is φ = 924477660.

The previous prime is 1386716491. The next prime is 1386716543. The reversal of 1386716493 is 3946176831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3946176831 = 3 ⋅1315392277.

It is not a de Polignac number, because 1386716493 - 2¹ = 1386716491 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 (1386716491) 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, 231119413 + ... + 231119418.

It is an arithmetic number, because the mean of its divisors is an integer number (462238832).

Almost surely, 2^1386716493 is an apocalyptic number.

It is an amenable number.

1386716493 is a deficient number, since it is larger than the sum of its proper divisors (462238835).

1386716493 is an equidigital number, since it uses as much as digits as its factorization.

1386716493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462238834.

The product of its digits is 653184, while the sum is 48.

The square root of 1386716493 is about 37238.6424698860. The cubic root of 1386716493 is about 1115.1395705623.

The spelling of 1386716493 in words is "one billion, three hundred eighty-six million, seven hundred sixteen thousand, four hundred ninety-three".