1387613 has 4 divisors (see below), whose sum is σ = 1447968. Its totient is φ = 1327260.

The previous prime is 1387601. The next prime is 1387649. The reversal of 1387613 is 3167831.

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: 3167831 = 17 ⋅186343.

It is a cyclic number.

It is not a de Polignac number, because 1387613 - 2⁴ = 1387597 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 (1387213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30143 + ... + 30188.

It is an arithmetic number, because the mean of its divisors is an integer number (361992).

2^1387613 is an apocalyptic number.

It is an amenable number.

1387613 is a deficient number, since it is larger than the sum of its proper divisors (60355).

1387613 is an equidigital number, since it uses as much as digits as its factorization.

1387613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60354.

The product of its digits is 3024, while the sum is 29.

The square root of 1387613 is about 1177.9698637911. The cubic root of 1387613 is about 111.5379829974.

The spelling of 1387613 in words is "one million, three hundred eighty-seven thousand, six hundred thirteen".