44169981 has 4 divisors (see below), whose sum is σ = 58893312. Its totient is φ = 29446652.

The previous prime is 44169967. The next prime is 44170013. The reversal of 44169981 is 18996144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 44169981 - 2⁹ = 44169469 is a prime.

It is a super-2 number, since 2×44169981² = 3901974443080722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44169911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7361661 + ... + 7361666.

It is an arithmetic number, because the mean of its divisors is an integer number (14723328).

Almost surely, 2^44169981 is an apocalyptic number.

It is an amenable number.

44169981 is a deficient number, since it is larger than the sum of its proper divisors (14723331).

44169981 is a wasteful number, since it uses less digits than its factorization.

44169981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14723330.

The product of its digits is 62208, while the sum is 42.

The square root of 44169981 is about 6646.0500299050. The cubic root of 44169981 is about 353.4888646198.

It can be divided in two parts, 44169 and 981, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 44169981 in words is "forty-four million, one hundred sixty-nine thousand, nine hundred eighty-one".