1643413 has 4 divisors (see below), whose sum is σ = 1658880. Its totient is φ = 1627948.

The previous prime is 1643387. The next prime is 1643423. The reversal of 1643413 is 3143461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3143461 = 59 ⋅53279.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1643413 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 (1643423) 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, 7573 + ... + 7786.

It is an arithmetic number, because the mean of its divisors is an integer number (414720).

2^1643413 is an apocalyptic number.

It is an amenable number.

1643413 is a deficient number, since it is larger than the sum of its proper divisors (15467).

1643413 is a wasteful number, since it uses less digits than its factorization.

1643413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15466.

The product of its digits is 864, while the sum is 22.

The square root of 1643413 is about 1281.9567075373. The cubic root of 1643413 is about 118.0091202373.

Adding to 1643413 its reverse (3143461), we get a palindrome (4786874).

The spelling of 1643413 in words is "one million, six hundred forty-three thousand, four hundred thirteen".