1393859 has 4 divisors (see below), whose sum is σ = 1467240. Its totient is φ = 1320480.

The previous prime is 1393837. The next prime is 1393871. The reversal of 1393859 is 9583931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9583931 = 7 ⋅1369133.

It is a cyclic number.

It is not a de Polignac number, because 1393859 - 2¹⁶ = 1328323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1393159) 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, 36662 + ... + 36699.

It is an arithmetic number, because the mean of its divisors is an integer number (366810).

2^1393859 is an apocalyptic number.

1393859 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1393859 is a deficient number, since it is larger than the sum of its proper divisors (73381).

1393859 is an equidigital number, since it uses as much as digits as its factorization.

1393859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73380.

The product of its digits is 29160, while the sum is 38.

The square root of 1393859 is about 1180.6180584762. The cubic root of 1393859 is about 111.7050861588.

The spelling of 1393859 in words is "one million, three hundred ninety-three thousand, eight hundred fifty-nine".