413445981 has 32 divisors (see below), whose sum is σ = 616734720. Its totient is φ = 244730304.

The previous prime is 413445979. The next prime is 413446013. The reversal of 413445981 is 189544314.

It is not a de Polignac number, because 413445981 - 2¹ = 413445979 is a prime.

It is a super-2 number, since 2×413445981² = 341875158410104722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (413445961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106236 + ... + 110058.

It is an arithmetic number, because the mean of its divisors is an integer number (19272960).

Almost surely, 2^413445981 is an apocalyptic number.

It is an amenable number.

413445981 is a deficient number, since it is larger than the sum of its proper divisors (203288739).

413445981 is a wasteful number, since it uses less digits than its factorization.

413445981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945.

The product of its digits is 69120, while the sum is 39.

The square root of 413445981 is about 20333.3711174512. The cubic root of 413445981 is about 744.9713851748.

The spelling of 413445981 in words is "four hundred thirteen million, four hundred forty-five thousand, nine hundred eighty-one".