1872168085 has 8 divisors (see below), whose sum is σ = 2247669720. Its totient is φ = 1497022464.

The previous prime is 1872168083. The next prime is 1872168101. The reversal of 1872168085 is 5808612781.

It can be written as a sum of positive squares in 4 ways, for example, as 222427396 + 1649740689 = 14914^2 + 40617^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1872168085 - 2¹ = 1872168083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872168083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77292 + ... + 98581.

It is an arithmetic number, because the mean of its divisors is an integer number (280958715).

Almost surely, 2^1872168085 is an apocalyptic number.

It is an amenable number.

1872168085 is a deficient number, since it is larger than the sum of its proper divisors (375501635).

1872168085 is a wasteful number, since it uses less digits than its factorization.

1872168085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178007.

The product of its (nonzero) digits is 215040, while the sum is 46.

The square root of 1872168085 is about 43268.5576949359. The cubic root of 1872168085 is about 1232.4849152028.

The spelling of 1872168085 in words is "one billion, eight hundred seventy-two million, one hundred sixty-eight thousand, eighty-five".