1671078085 has 4 divisors (see below), whose sum is σ = 2005293708. Its totient is φ = 1336862464.

The previous prime is 1671078029. The next prime is 1671078109. The reversal of 1671078085 is 5808701761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5808701761 = 73 ⋅79571257.

It can be written as a sum of positive squares in 2 ways, for example, as 1097331876 + 573746209 = 33126^2 + 23953^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671078085 - 2¹¹ = 1671076037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167107804 + ... + 167107813.

It is an arithmetic number, because the mean of its divisors is an integer number (501323427).

Almost surely, 2^1671078085 is an apocalyptic number.

It is an amenable number.

1671078085 is a deficient number, since it is larger than the sum of its proper divisors (334215623).

1671078085 is an equidigital number, since it uses as much as digits as its factorization.

1671078085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334215622.

The product of its (nonzero) digits is 94080, while the sum is 43.

The square root of 1671078085 is about 40878.8219619891. The cubic root of 1671078085 is about 1186.6762428827.

The spelling of 1671078085 in words is "one billion, six hundred seventy-one million, seventy-eight thousand, eighty-five".