44991893 has 4 divisors (see below), whose sum is σ = 45534048. Its totient is φ = 44449740.

The previous prime is 44991839. The next prime is 44991913. The reversal of 44991893 is 39819944.

44991893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 44991893 - 2¹⁸ = 44729749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44991823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270953 + ... + 271118.

It is an arithmetic number, because the mean of its divisors is an integer number (11383512).

Almost surely, 2^44991893 is an apocalyptic number.

It is an amenable number.

44991893 is a deficient number, since it is larger than the sum of its proper divisors (542155).

44991893 is an equidigital number, since it uses as much as digits as its factorization.

44991893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542154.

The product of its digits is 279936, while the sum is 47.

The square root of 44991893 is about 6707.5996451786. The cubic root of 44991893 is about 355.6679693632.

The spelling of 44991893 in words is "forty-four million, nine hundred ninety-one thousand, eight hundred ninety-three".