1349639 has 4 divisors (see below), whose sum is σ = 1368720. Its totient is φ = 1330560.

The previous prime is 1349533. The next prime is 1349651. The reversal of 1349639 is 9369431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9369431 = 17 ⋅551143.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1349639 is a prime.

It is a d-powerful number, because it can be written as 1 + 3⁵ + 4² + 9⁴ + 6⁷ + 3¹² + 9⁶ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1349599 and 1349608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1349669) 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, 9434 + ... + 9575.

It is an arithmetic number, because the mean of its divisors is an integer number (342180).

2^1349639 is an apocalyptic number.

1349639 is a deficient number, since it is larger than the sum of its proper divisors (19081).

1349639 is an equidigital number, since it uses as much as digits as its factorization.

1349639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19080.

The product of its digits is 17496, while the sum is 35.

The square root of 1349639 is about 1161.7396438101. The cubic root of 1349639 is about 110.5110927079.

The spelling of 1349639 in words is "one million, three hundred forty-nine thousand, six hundred thirty-nine".