1639413 has 8 divisors (see below), whose sum is σ = 2428800. Its totient is φ = 1092924.

The previous prime is 1639409. The next prime is 1639427. The reversal of 1639413 is 3149361.

It is not a de Polignac number, because 1639413 - 2² = 1639409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 60719 = 1639413 / (1 + 6 + 3 + 9 + 4 + 1 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30333 + ... + 30386.

It is an arithmetic number, because the mean of its divisors is an integer number (303600).

2^1639413 is an apocalyptic number.

It is an amenable number.

1639413 is a deficient number, since it is larger than the sum of its proper divisors (789387).

1639413 is an equidigital number, since it uses as much as digits as its factorization.

1639413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60728 (or 60722 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 1639413 is about 1280.3956419795. The cubic root of 1639413 is about 117.9132993305.

The spelling of 1639413 in words is "one million, six hundred thirty-nine thousand, four hundred thirteen".