1390079 has 4 divisors (see below), whose sum is σ = 1393320. Its totient is φ = 1386840.

The previous prime is 1390069. The next prime is 1390087. The reversal of 1390079 is 9700931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9700931 = 17 ⋅570643.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1390079 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 (1390019) 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, 857 + ... + 1874.

It is an arithmetic number, because the mean of its divisors is an integer number (348330).

2^1390079 is an apocalyptic number.

1390079 is a deficient number, since it is larger than the sum of its proper divisors (3241).

1390079 is an equidigital number, since it uses as much as digits as its factorization.

1390079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 1390079 is about 1179.0161152419. The cubic root of 1390079 is about 111.6040172327.

The spelling of 1390079 in words is "one million, three hundred ninety thousand, seventy-nine".