1671894369 has 12 divisors (see below), whose sum is σ = 2415449556. Its totient is φ = 1114369632.

The previous prime is 1671894347. The next prime is 1671894377. The reversal of 1671894369 is 9634981761.

It can be written as a sum of positive squares in 2 ways, for example, as 1253160000 + 418734369 = 35400^2 + 20463^2 .

It is not a de Polignac number, because 1671894369 - 2⁷ = 1671894241 is a prime.

It is a super-2 number, since 2×1671894369² = 5590461562187816322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1671894319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36339 + ... + 68295.

It is an arithmetic number, because the mean of its divisors is an integer number (201287463).

Almost surely, 2^1671894369 is an apocalyptic number.

It is an amenable number.

1671894369 is a deficient number, since it is larger than the sum of its proper divisors (743555187).

1671894369 is a wasteful number, since it uses less digits than its factorization.

1671894369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37776 (or 37773 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 1671894369 is about 40888.8049348474. The cubic root of 1671894369 is about 1186.8694329672.

The spelling of 1671894369 in words is "one billion, six hundred seventy-one million, eight hundred ninety-four thousand, three hundred sixty-nine".