1399829 has 4 divisors (see below), whose sum is σ = 1407276. Its totient is φ = 1392384.

The previous prime is 1399819. The next prime is 1399837. The reversal of 1399829 is 9289931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9289931 = 7 ⋅1327133.

It can be written as a sum of positive squares in 2 ways, for example, as 677329 + 722500 = 823^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399829 - 2⁴ = 1399813 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 (1399819) 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, 3434 + ... + 3819.

It is an arithmetic number, because the mean of its divisors is an integer number (351819).

2^1399829 is an apocalyptic number.

It is an amenable number.

1399829 is a deficient number, since it is larger than the sum of its proper divisors (7447).

1399829 is an equidigital number, since it uses as much as digits as its factorization.

1399829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7446.

The product of its digits is 34992, while the sum is 41.

The square root of 1399829 is about 1183.1436937245. The cubic root of 1399829 is about 111.8643393606.

The spelling of 1399829 in words is "one million, three hundred ninety-nine thousand, eight hundred twenty-nine".