411640981 has 4 divisors (see below), whose sum is σ = 411812332. Its totient is φ = 411469632.

The previous prime is 411640979. The next prime is 411640997. The reversal of 411640981 is 189046114.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 189046114 = 2 ⋅94523057.

It can be written as a sum of positive squares in 2 ways, for example, as 286760356 + 124880625 = 16934^2 + 11175^2 .

It is a cyclic number.

It is not a de Polignac number, because 411640981 - 2¹ = 411640979 is a prime.

It is a super-2 number, since 2×411640981² = 338896594477284722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (411640921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82020 + ... + 86893.

It is an arithmetic number, because the mean of its divisors is an integer number (102953083).

Almost surely, 2^411640981 is an apocalyptic number.

It is an amenable number.

411640981 is a deficient number, since it is larger than the sum of its proper divisors (171351).

411640981 is a wasteful number, since it uses less digits than its factorization.

411640981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171350.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 411640981 is about 20288.9374044083. The cubic root of 411640981 is about 743.8856851430.

The spelling of 411640981 in words is "four hundred eleven million, six hundred forty thousand, nine hundred eighty-one".