1648171313 has 4 divisors (see below), whose sum is σ = 1676106480. Its totient is φ = 1620236148.

The previous prime is 1648171307. The next prime is 1648171333. The reversal of 1648171313 is 3131718461.

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.

It is a cyclic number.

It is not a de Polignac number, because 1648171313 - 2⁶ = 1648171249 is a prime.

It is a super-2 number, since 2×1648171313² = 5432937353992287938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1648171303) 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, 13967495 + ... + 13967612.

It is an arithmetic number, because the mean of its divisors is an integer number (419026620).

Almost surely, 2^1648171313 is an apocalyptic number.

It is an amenable number.

1648171313 is a deficient number, since it is larger than the sum of its proper divisors (27935167).

1648171313 is an equidigital number, since it uses as much as digits as its factorization.

1648171313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27935166.

The product of its digits is 12096, while the sum is 35.

The square root of 1648171313 is about 40597.6762019700. The cubic root of 1648171313 is about 1181.2290442873.

Adding to 1648171313 its reverse (3131718461), we get a palindrome (4779889774).

The spelling of 1648171313 in words is "one billion, six hundred forty-eight million, one hundred seventy-one thousand, three hundred thirteen".