1379889 has 32 divisors (see below), whose sum is σ = 2400000. Its totient is φ = 783216.

The previous prime is 1379887. The next prime is 1379897. The reversal of 1379889 is 9889731.

It is not a de Polignac number, because 1379889 - 2¹ = 1379887 is a prime.

1379889 is a lucky number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9187 + ... + 9335.

It is an arithmetic number, because the mean of its divisors is an integer number (75000).

2^1379889 is an apocalyptic number.

It is an amenable number.

1379889 is a deficient number, since it is larger than the sum of its proper divisors (1020111).

1379889 is an equidigital number, since it uses as much as digits as its factorization.

1379889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 159 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1379889 is about 1174.6867667595. The cubic root of 1379889 is about 111.3306430400.

The spelling of 1379889 in words is "one million, three hundred seventy-nine thousand, eight hundred eighty-nine".