1671319999 has 4 divisors (see below), whose sum is σ = 1686653320. Its totient is φ = 1655986680.

The previous prime is 1671319981. The next prime is 1671320041. The reversal of 1671319999 is 9999131761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9999131761 = 83 ⋅120471467.

It is a cyclic number.

It is not a de Polignac number, because 1671319999 - 2¹⁵ = 1671287231 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 (1671319499) 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, 7666497 + ... + 7666714.

It is an arithmetic number, because the mean of its divisors is an integer number (421663330).

Almost surely, 2^1671319999 is an apocalyptic number.

1671319999 is a deficient number, since it is larger than the sum of its proper divisors (15333321).

1671319999 is a wasteful number, since it uses less digits than its factorization.

1671319999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15333320.

The product of its digits is 826686, while the sum is 55.

The square root of 1671319999 is about 40881.7807709009. The cubic root of 1671319999 is about 1186.7335032720.

The spelling of 1671319999 in words is "one billion, six hundred seventy-one million, three hundred nineteen thousand, nine hundred ninety-nine".