945852181 has 4 divisors (see below), whose sum is σ = 946203532. Its totient is φ = 945500832.

The previous prime is 945852163. The next prime is 945852203. The reversal of 945852181 is 181258549.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 426422500 + 519429681 = 20650^2 + 22791^2 .

It is a cyclic number.

It is not a de Polignac number, because 945852181 - 2¹⁷ = 945721109 is a prime.

It is a super-4 number, since 4×945852181⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945852101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171606 + ... + 177031.

It is an arithmetic number, because the mean of its divisors is an integer number (236550883).

Almost surely, 2^945852181 is an apocalyptic number.

It is an amenable number.

945852181 is a deficient number, since it is larger than the sum of its proper divisors (351351).

945852181 is a wasteful number, since it uses less digits than its factorization.

945852181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351350.

The product of its digits is 115200, while the sum is 43.

The square root of 945852181 is about 30754.7098994609. The cubic root of 945852181 is about 981.6147822697.

The spelling of 945852181 in words is "nine hundred forty-five million, eight hundred fifty-two thousand, one hundred eighty-one".