440087161 has 4 divisors (see below), whose sum is σ = 440143092. Its totient is φ = 440031232.

The previous prime is 440087159. The next prime is 440087189. The reversal of 440087161 is 161780044.

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 404613225 + 35473936 = 20115^2 + 5956^2 .

It is a cyclic number.

It is not a de Polignac number, because 440087161 - 2¹ = 440087159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440037161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13756 + ... + 32701.

It is an arithmetic number, because the mean of its divisors is an integer number (110035773).

Almost surely, 2^440087161 is an apocalyptic number.

It is an amenable number.

440087161 is a deficient number, since it is larger than the sum of its proper divisors (55931).

440087161 is an equidigital number, since it uses as much as digits as its factorization.

440087161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55930.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 440087161 is about 20978.2544793412. The cubic root of 440087161 is about 760.6407114333.

The spelling of 440087161 in words is "four hundred forty million, eighty-seven thousand, one hundred sixty-one".