1390089 has 4 divisors (see below), whose sum is σ = 1853456. Its totient is φ = 926724.

The previous prime is 1390087. The next prime is 1390111. The reversal of 1390089 is 9800931.

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.

It is not a de Polignac number, because 1390089 - 2¹ = 1390087 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1390087) 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, 231679 + ... + 231684.

It is an arithmetic number, because the mean of its divisors is an integer number (463364).

2^1390089 is an apocalyptic number.

It is an amenable number.

1390089 is a deficient number, since it is larger than the sum of its proper divisors (463367).

1390089 is an equidigital number, since it uses as much as digits as its factorization.

1390089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463366.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1390089 is about 1179.0203560584. The cubic root of 1390089 is about 111.6042848524.

The spelling of 1390089 in words is "one million, three hundred ninety thousand, eighty-nine".