1671994893 has 16 divisors (see below), whose sum is σ = 2247574016. Its totient is φ = 1105565760.

The previous prime is 1671994871. The next prime is 1671994939. The reversal of 1671994893 is 3984991761.

It is not a de Polignac number, because 1671994893 - 2⁵ = 1671994861 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 (1671994853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285828 + ... + 291618.

It is an arithmetic number, because the mean of its divisors is an integer number (140473376).

Almost surely, 2^1671994893 is an apocalyptic number.

It is an amenable number.

1671994893 is a deficient number, since it is larger than the sum of its proper divisors (575579123).

1671994893 is a wasteful number, since it uses less digits than its factorization.

1671994893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6564.

The product of its digits is 2939328, while the sum is 57.

The square root of 1671994893 is about 40890.0341525903. The cubic root of 1671994893 is about 1186.8932196518.

The spelling of 1671994893 in words is "one billion, six hundred seventy-one million, nine hundred ninety-four thousand, eight hundred ninety-three".