1379647 has 4 divisors (see below), whose sum is σ = 1452280. Its totient is φ = 1307016.

The previous prime is 1379641. The next prime is 1379657. The reversal of 1379647 is 7469731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7469731 = 643 ⋅11617.

It is a cyclic number.

It is not a de Polignac number, because 1379647 - 2³ = 1379639 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379641) 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, 36288 + ... + 36325.

It is an arithmetic number, because the mean of its divisors is an integer number (363070).

2^1379647 is an apocalyptic number.

1379647 is a deficient number, since it is larger than the sum of its proper divisors (72633).

1379647 is an equidigital number, since it uses as much as digits as its factorization.

1379647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72632.

The product of its digits is 31752, while the sum is 37.

The square root of 1379647 is about 1174.5837560600. The cubic root of 1379647 is about 111.3241344028.

The spelling of 1379647 in words is "one million, three hundred seventy-nine thousand, six hundred forty-seven".