43911961 has 4 divisors (see below), whose sum is σ = 43936612. Its totient is φ = 43887312.

The previous prime is 43911953. The next prime is 43911971. The reversal of 43911961 is 16911934.

It is a happy number.

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 22382361 + 21529600 = 4731^2 + 4640^2 .

It is a cyclic number.

It is not a de Polignac number, because 43911961 - 2³ = 43911953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43911971) 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, 9426 + ... + 13291.

It is an arithmetic number, because the mean of its divisors is an integer number (10984153).

Almost surely, 2^43911961 is an apocalyptic number.

It is an amenable number.

43911961 is a deficient number, since it is larger than the sum of its proper divisors (24651).

43911961 is a wasteful number, since it uses less digits than its factorization.

43911961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24650.

The product of its digits is 5832, while the sum is 34.

The square root of 43911961 is about 6626.6100685041. The cubic root of 43911961 is about 352.7992154529.

The spelling of 43911961 in words is "forty-three million, nine hundred eleven thousand, nine hundred sixty-one".