1681364471 has 4 divisors (see below), whose sum is σ = 1726806792. Its totient is φ = 1635922152.

The previous prime is 1681364441. The next prime is 1681364479. The reversal of 1681364471 is 1744631861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1681364471 is a prime.

It is a super-3 number, since 3×1681364471³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681364479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22721105 + ... + 22721178.

It is an arithmetic number, because the mean of its divisors is an integer number (431701698).

Almost surely, 2^1681364471 is an apocalyptic number.

1681364471 is a deficient number, since it is larger than the sum of its proper divisors (45442321).

1681364471 is an equidigital number, since it uses as much as digits as its factorization.

1681364471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45442320.

The product of its digits is 96768, while the sum is 41.

The square root of 1681364471 is about 41004.4445273924. Note that the first 3 decimals coincide. The cubic root of 1681364471 is about 1189.1061411253.

The spelling of 1681364471 in words is "one billion, six hundred eighty-one million, three hundred sixty-four thousand, four hundred seventy-one".