44813921 has 8 divisors (see below), whose sum is σ = 47814624. Its totient is φ = 41853760.

The previous prime is 44813917. The next prime is 44813927. The reversal of 44813921 is 12931844.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44813921 - 2² = 44813917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44813927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7835 + ... + 12288.

It is an arithmetic number, because the mean of its divisors is an integer number (5976828).

Almost surely, 2^44813921 is an apocalyptic number.

It is an amenable number.

44813921 is a deficient number, since it is larger than the sum of its proper divisors (3000703).

44813921 is a wasteful number, since it uses less digits than its factorization.

44813921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20271.

The product of its digits is 6912, while the sum is 32.

The square root of 44813921 is about 6694.3200550915. The cubic root of 44813921 is about 355.1983841242.

The spelling of 44813921 in words is "forty-four million, eight hundred thirteen thousand, nine hundred twenty-one".